gras: update submodules
Merge branch 'gras_tool3'
grextras: create test macro that works w/ tool
gras: take care of some misc warnings
gras: fixed docs for factory
gras: jit factory api + unit tests
gras: update grextras submodule for awesome work
gras: require cmake 2.8
gras: jit factory automatically adds GRAS_ROOT include path
gras: work on using clang api - but commented out

The last thing missing is that the API use case
doesnt automatically have default C++ include paths.
gras: jit factory use FindProgramByName
gras: removed extra slashes
gras: missing ifdef for jit factory w/o llvm
gras: added gcc warning unused flag