Merge pull request #12 from Pie-Studios/master

Merge from branches
Merge remote-tracking branch 'origin/master' into ui-rendering
Added threaded content loading(Streaming)

- Built Lock and Condition classes(based on Python versions)
- Built EventQueue with Threading
- Added default style UI images
- Added AddDirectory for LalPckBuilder
- Made LogManager thread-safe(ish)
Changed name from Screen to GameWindow
Forgot a documentation
It will be called gamewindow, soon
Now its GameWindow
First version of ScriptEngine
Merge 'ui-rendering' into 'master'