Fixed a problem with the highlightning of selected Selection Objects.

Also re-enabled the Selection using a right-click and drag option in the Canvas.
Added line for screenshot to render RTTfibers
Merge pull request #110 from chamberm/screenshot

RTTFibers are now rendered when taking a screenshot.
Merge pull request #112 from jchoude/bf-107-selhighlight

Fixed a problem with the highlightning of selected Selection Objects.

Fixes issue #107.
Beginning of lightweight GUI support.

- Added CMake variable to enable / disable building the lightweight GUI.
- Made some elements of the menu and toolbar hidden when in lightweight mode.
- Hid some options of the Anatomy class when in lightweight mode.
Lightgui now applied to Fibers and Fibersgroup datasets, and fibers related options.
Lightgui now applied to Glyph derived datasets.

Also moved some interface objects, to have a better layout.
Lightgui now applied to IsoSurfaces and Meshes.

Also moved some interface objects, to have a better layout.
Applied lightweight to selection objects.
Made the lightweight GUI the default one.
Fixed the size of local flipping buttons on Linux.
Now using the voxel size to correctly select the fibers.
Merge pull request #120 from jchoude/bug-113-crossing-shift

Fixed the shift for crossing fibers when using anat with voxel size different from 1x1x1
Merge branch 'master' into feature-lightweight
Changed caption of Descoteaux's basis button, and hid Dipy's.
Merge pull request #122 from jchoude/rename_basis_buttons

Changed caption of Descoteaux's basis button, and hid Dipy's.
Merge branch 'master' into feature-lightweight
Changed way string is created, to correct compilation problems on various platforms.
Merge pull request #123 from jchoude/fix_string

Changed way string is created, to correct compilation problems.
Merge branch 'master' into feature-lightweight