Relocate cmake.sh from proj root to dist dir
Add docs path to sublime proj file
Fix majority of known issues with CMake build script

* Compile using clang's c++11 & libc++ support

* Add OpenAL dependency

* Fix linking err with SDL2_image; we need to link with both
ImageIO & MobileCoreServices.

* Fix XCode's setting attribute for code signing.
Introduce image loading & TrueType font demos
Introduce several helper build scripts
Add three new TODO items