Adding flaky attribute for tests.

grpc: cpp_generator: fix pedantic warning on extra ';'

Fix pedantic warnings of form:

   myprotobuf.pb.cc:619:2: warning: extra ';' [-Wpedantic]
    };
     ^

Travis c++

"Upporting" commits from 0.5 into master.

Conflicts:
	INSTALL

Python code generator fixes.

Conflicts:
	.travis.yml

Conflicts:
	.travis.yml

Conflicts:
	.travis.yml

Better parallelization for C

Add timer to run_tests.py

For future profiling work to eliminate/speed-up slow tests.