4.0.3	06-06-2010
	* remove the usage.c file to avoid a GPL2-GPL3+ incompatibility
	* update the documentation
	* fix warning catched by clang

4.0.2	01-06-2010
	* add the ghkl manpage and .desktop file
	* fix the ghkl quit menuitem bugs

4.0.1	10-05-2010
	* fix a few ghkl bugs (.ui files installation)
	* add a --enable-ghkl=[yes,no] flag to allow compiling the gui interface
	* do not forgot to link ghkl against gsl.
	* display by default the preference panel of ghkl.

4.0.0	14-04-2010

	* add the autotools buildsystem and remove all other systems.
	* add a GUI ghkl for testing purpose based on gtkmm.
	* add the GNU info doc
	* add the gtk-doc to document the api (work in progress)
	* new structure for the HklDetector (prepare for 2D detectors)
	* HklGeometryConfig shared between all equivalent HklGeometries.
	* fix for 64 bits computers runtime error.
	* add the HklError class to report calculation errors (not yet used)
	* new way to set the UB matrix of a sample (hkl_sample_set_UB).
	* new ZAxis geometry
		- mode zaxis
		- mode reflectivity (mu = gamma)

3.0.1	23-10-2009

	* add the psi_constant mode to the e4cv, e6c, k4cv and k6c geometries. (thanks teresa)
	* upgrade the user guide to explain how to add a mode.
	* the horizontal modes are also valid if omega = +-PI. (e6c, k6c)
	* remove geometries with an invalid range from the list of solutions.

3.0.0	15-07-2009

	* Rewrote from scratch in C with the GSL library.
		- now most of pseudo axes modes are numeric.
		  So a 6 circles mode is now a real 6 circles mode.
	* Eulerian 4 circles
		- PseudoAxisEngine  "hkl": "h", "k", "l"
			* Mode "bissector"
			* Mode "constant_omega"
			* Mode "constant_chi"
			* Mode "constant_phi"
			* Mode "double_diffraction"
		- PseudoAxisEngine "psi": "psi"
			* Mode "psi"
	* Kappa 4 circles
		- PseudoAxisEngine  "hkl": "h", "k", "l"
			* Mode "bissector"
			* Mode "constant_omega"
			* Mode "constant_chi"
			* Mode "constant_phi"
			* Mode "double_diffraction"
		- PseudoAxisEngine "psi": "psi"
			* Mode "psi"
		- PseudoAxisEngien "eulerians": "omega", "chi", "phi"
			* mode "eulerians"
	* Eulerian 6 circles
		- PseudoAxisEngine  "hkl": "h", "k", "l"
			* Mode "bissector_vertical"
			* Mode "constant_omega_vertical"
			* Mode "constant_chi_vertical"
			* Mode "constant_phi_vertical"
			* Mode "double_diffraction_vertical"
			* Mode "lifting_detector"
			* Mode "bissector_horizontal"
			* Mode "double_diffraction_horizontal"
		- PseudoAxisEngine "psi": "psi"
			* Mode "psi"
	* Kappa 6 circles
		- PseudoAxisEngine  "hkl": "h", "k", "l"
			* Mode "bissector_vertical"
			* Mode "constant_omega_vertical"
			* Mode "constant_chi_vertical"
			* Mode "constant_phi_vertical"
			* Mode "double_diffraction_vertical"
			* Mode "lifting_detector"
			* Mode "bissector_horizontal"
			* Mode "constant_phi_horizontal"
			* Mode "constant_kphi_horizontal"
			* Mode "double_diffraction_horizontal"
		- PseudoAxisEngine "psi": "psi"
			* Mode "psi"
		- PseudoAxisEngien "eulerians": "omega", "chi", "phi"
			* mode "eulerians"

2.3.0   24-01-2007

    * Refactoring of the sample part.
      - It is now possible to create different kind of samples easily.
        - MonoCrystal type.

    * Diffractometers:
      - Eulerian 6 Circles.
      - kappa 4 Circles Vertical.
    
    * Refactoring of the PseudoAxe part.
      - Derived PseudoAxe can be created from an already existing PseudoAxe if the Geometry conversion exist.
      - Better related PseudoAxes (ex Eulerians on a Kappa)
      - The PseudoAxe is just a interface, computation is done by the PseudoAxeEngine.
      - Eulerian 4 Circles Vertical
        - "th2th" : derived from the twoC
        - "q2th" : derived from the twoC
        - "q" : derived from the twoC
      - kappa 4 Circles Vertical
        - "omega", "chi", "phi" : eulerian 4 circles Vertical pseudoAxes.
        - "th2th" : derived from the twoC
        - "q2th" : derived from the twoC
        - "q" : derived from the twoC
        - "psi" : derived from the Eulerian 4 Circlers Vertical.
      - Eulerian 6 Circles:
        - "tth" : 2 * theta
        - "q" : 2 * tau * sin(theta) / lambda
        - "psi" : derived from the Eulerian 4 Circlers Vertical.
      - Kappa6C
        - "omega", "chi", "phi" : derived from the Kappa 4 Circles Vertical.
        - "tth" derived from the Eulerian6C.
        - "q" derived from the Eulerian6C.
        - "psi" : derived from the Eulerian 4 Circlers Vertical.
    
    * Refactoring of the Modes.
      - Derived Mode can be created from an already existing Mode if the Geometry conversion exist.
      - all Eulerian 4 Circles on the kappa4C, Eulerian6c and Kappa6C diffractometers.


2.2.0   19-06-2006
    
    * Diffractometers:
      - twoC Vertical.
      - Eulerian 4 Circles Vertical.
      - Kappa 6 Circles.
    
    * PseudoAxes
      - twoC
        - "th2th": omega - 2theta (domega = d2theta / 2)
        - "q2th" : omega - 2theta (domega = d2theta / 2) but q2th = 2 tau sin(theta) / lambda
        - "q" : 2 * tau * sin(theta) / lambda
      - Eulerian 4 Circles Vertical
        - "th2th": omega - 2theta (domega = d2theta / 2)
        - "q2th" : omega - 2theta (domega = d2theta / 2) but q2th = 2 tau sin(theta) / lambda
        - "q" : 2 * tau * sin(theta) / lambda
        - "psi" : Rotation of the sample oaround the Q vector.
    
    * Modes
      - twoC
        - "symetric" (omega = theta, 2theta = 2 * theta)
        - "fix incidence" (omega = free, 2theta = 2 * theta)
      - Eulerian 4 circles:
        - "Bissector"
        - "Delta Theta"
        - "Constant Omega"
        - "Constant Chi"
        - 'Constant Phi"
      - Kappa6C
        - all Eulerian 4 Circles modes.
