Change data structure of log_data_grid

Need the "from" and "to" to automatically load a csv file format.
Replace a set of structures with a map of struct containing the geometry
of each segment
improvement: categorical selectors.

Add absolute value to unary actions
fix some constness in gstlpoints
move rename_dialog from project gui to qtplugin
added support to grid

capped value actions
Refactoring:  MAJOR BACKWARD INCOMPATIBILITY

Changed all GsTLAppli_* to ar2gems_*
Changed charts to ar2gems_charts
Changed GsTLAppli_filters to ar2gems_io
Changed GsTLWidgets to ar2gems_widgets

All plugins will need to change the dependency library.  A quick way of
doing it is to open the vcxproj into text and to perform a find/replace
of "GsTLAppli_" to "ar2gems_"
Removal of the "extra" subfolder

The projects qtplugins, extragui and qwt are now at the same folder
level than all other projects.  Had to change the include path for all
the projects

Changed GsTLAppli/extra/qwt  to GsTLAppli/qwt
Changed GsTLAppli/extra/qtplugins  GsTLAppli/qtplugins
Changed GsTLAppli/extra/gui  GsTLAppli/widget_accessor
Refactor: GsTLGridRegion into Grid_region
Refactor: GsTLGridProperty

Changed GsTLGridProperty to Grid_continuous_property
Changed GsTLGridCategoricalProperty to Grid_categorical_property
Changed folder GsTLAppli to ar2gems
Chage in the path of the include file

The path is changed from <GsTLAppli/module/file.h> to <module/file.h>
updated pro file (need testing)

Doxygen parameter file with dot