renamed object.py to baseobject.py to stop confusion between object-baseclass and the file. added a cube test.
added textured cube, refactored poly4 in CubeObject, edited main.py
completed the application base class
created a function to handle screen resize, now in glOrtho-mode
added coordinates to the cube
fixed textured polygon rendering, disabled backface drawing
tweaks to testing
added boundingbox.py for collision checking
added a new test based on the application class
Merge pull request #7 from Tyyppi77/master

added textured cube and fixed few bugs in CubeObject