Merge pull request #89 from sufulow/master

fix Container.cpp and Renderable.cpp
if displaysystem is left unspecified, always start application using the Null
display system
removed unused var
NEW: config initScript
Merge branch 'master' of https://github.com/uic-evl/omegalib
v5.3
switched version to 6.0-alpha1
CHANGE: Path change during loading
during loading, path to configuration file is added to data search paths, so
scripts and resources local to config file can be found
CHANGE: reorderer initialization sequence
display is setup before script initialization, so init script can access the
display
updated doxyfile version
Merge pull request #90 from sufulow/master

add interface to DrawInterface to create shader by source text
NEW: System configuration settings passed to SoundManager
Merge branch 'master' of https://github.com/febret/omegalib
Update default_init.py
updated omicron
CHANGE: optional string parameter in all omegalib apps is now app config.
This can be used to launch applications directly from their config file
(files will use the .oapp extension)