Added all *-build terminated folders to .gitignore, for QtCreator users.
VIBes viewer: Removed scrollbars from the Figure2D view. Zoom with mouse wheel now centers the view on mouse position.
Rolled-out center on mouse pointer when zooming with scroll-wheel: problems with trackpad based wheel events (e.g. on mac computers).
Force update of tree-view when adding or deleting a figure.
Merge remote-tracking branch 'remotes/upstream/master'

Conflicts:
	viewer/vibeswindow.cpp
Added WIN32 and MACOSX_BUNDLE options to the CMake of VIBes-viewer: do not show console on Windows and build an application bundle for MacOS X.
Merge pull request #31 from dvinc/master

For v0.1.0-alpha
Implemented Ellipse drawing from [center, orientation] and [mean, covariance matrix]. Fixed typos in all_commands.json (missing ",")
Merge remote-tracking branch 'upstream/master'
Merge branch 'ADDING_POINTS'