[masa]: adding to changelog in respose to previous commit, wrt feature #1068
[masa]: adding configure option for exception handling, as per feature #1068.  everything still working.
[masa]: adding correct ifdef symbol (feature #1068)
[masa]: error is deprecated
[masa]: adding throw option for masa_exception. ticket #1068 about 50% done: now just for regression testing
[masa]: exception handling working perfectly, thanks to roystgnr for the suggestions for ripping from libmesh. This closes feature #1068
[masa]: making exception call masa_exit global to masa namespace, final few tweaks to #1068
[masa]: forgot to add the actual catch exception routine! #1068
[masa]: adding test to verify pointer sanity
[masa]: converting exit to masa_exit function call, for improved unit testing
[masa]: adding a super obscure crazy error handler that is actually quite useful, if someone ever was mucking around with deep masa guts -- this is a nice component of support #1033
[masa]: going for 100%
[masa]: silencing some noise
[masa]: got you-- should be fully covered now
[masa]: adding comments and appending to changelog
[masa]: fixing return statement which was giving compile warnings
[masa]: one lining a return statement
[masa]: adding euler gradient for feature #1074. Need to add actual source terms as well as regression testing
[masa]: adding regression tests for euler2d,3d gradient error check. continuation of feature #1074
[masa]: adding cns2d,3d class def for gradient terms (feature #1074)