Blender Git Loki

Camera tracking integration
===========================

- libmv's sources would now be added to qtcreator project.
- Fixed compilation with blenderplayer enabled and cmake.
- Fixed bug when tracking was done from frame different from
initial marker's frame number.
- Implemented backwards tracking.
- Added option to draw track's path. Would be enabled by default
for new scenes. Could be enabled on "Display" panel for
files saved in previous version.
- Added operator to clean track path so it could be
easily tracked form scratch.
- Added hotkeys for tracking, backwards tracking and
cleaning track path (Ctrl-T, Ctrl-Shift-T and Alt-T).
- Fixed crash when setting clip as a footage.
- Small optimization when trying to track without
selected markers.