Fixed bug in outputting velocity gradients
Merge branch 'master' of http://github.com/su2code/SU2

Updating the output
Changed CSysVector changed from const unsigned long to const unsigned int
Changed all of CSysVector, not just getter and setter methods
CTransLMSolver had a variable as an int which should have been an unsigned long
Changed a bunch of CGridAdaptation to be unsigned long rather than int
Merge branch 'master' of https://github.com/su2code/SU2 into feature_TNE2
Resolved conflicts.