Merge pull request #128 from hlkline/upstream_dev

Mass flow rate and supersonic inlet adjoint bc's (euler)
Updated output
Removing MPI_INT
Merge branch 'develop' of https://github.com/su2code/SU2 into develop
Updated MPI and output
First cut
Deleted a repeated line of code.
Final implementation
Merge pull request #130 from su2code/feature_DEF

Updated SU2_DEF
Small fix (US units)
fixing some doxygen warnings. Note: HAVE_DOT should = NO in DOXYFILE (not in git)
Merge remote-tracking branch 'upstream/develop' into upstream_dev