Proto commits in jieyu/maple

These 2 commits are when the Protocol Buffers files have changed:

Commit:8c491d0
Author:Jie Yu

Integrated the runtime callstack tracking mechanism. Refactored the function wrapper code. Removed unused files.

The documentation is generated from this commit.

Commit:b381fc4
Author:Jie Yu

Initial import from the original svn repository. This is the version right before the OOPSLA'12 rebuttal.