made the getframe function a bit more safe and modified a few names for clarity
add RAII wrapper class for sources
updated UI files
renamed obs.cpp/hpp
changed header reference to obs-app.hpp
do first test drawing in wx
add a 'wrapper' file for wx
remove ssize_t because it's not even used anyway anymore
fixed a few bugs with config files, and replaced a boolean parameter with an enum
added os_mkdir to platform functions
updated obs basic window form (needed an ID and needed a OnClose callback)
added initial config file stuff, set up a 'dummy' window to cause the graphics system to persist through window changes
remove sys/stat.h include from obs-app.cpp