FIX: ogetcwd returned non-null terminated string on linux
Merge branch 'master' of github.com:uic-evl/omegalib
updated doxyfile
UPDATE: version now 6.0-beta2
NEW: Widget::isDragging
FIX: layout refresh skipped if widget is in a free layout container
NEW: Widget::isDragging
CHANGE: display system setup is skipped if a display system has already been
specified

This is useful to let omegalib modules register a custom display system. Will
use this for DK2 oculus rift support.
NEW: Engine::setDefaultCamera
Used to override default camera with a custom camera class
CHANGE: Added virtual method to camera
needed for oculus module custom camera and to implement custom
cameras in general
FIX: uninitalized variable
FIX: build
FIX: added missing default camera calls
UPDATE: version not 6.0-beta3
FIX: missing export
FIX: Depth texture now uses floating point for data
OSX Yosemite support
disabled some OSX warnings
untabify
FIX: side by side stereo (issue #123)