Bulk commits: When you don't really care at the moment.
Updated HawkUtils.
Updated build.gradle.
Display now throws a CaelumException if it hasn't been initiated, instead of a NPE.
DisplayManager now shuts down with an error code of 0.
Reformatted ExampleGame.
AssetManager:
* Attempted to fix the default IAssetStreamer.
* Removed dropAsset(). It was prone to bugs.
IAssetStreamer now only consists of getIn().
Corrected a bug in Canvas, wherein it would always throw a GL_INVALID_OPERATION exception.
Corrected an oversight in GL1.glBufferSubData() that would cause a GL_INVALID_ENUM exception.
GL3.glFramebufferRenderbuffer() now works.
VertexBuffer no longer uses getTarget() at all, instead using t.