Implemented check for NAN and infinite numbers in FloatArray and FloatMatrix.
Optimized some routines and changed to StaticStructural in some test
cases. Also made some fixes in PrescribedGradientBC.
Added files forgotten in previous commit.
Made OOFEM compile with Clang.
Fixed some warnings detected by Clang.
Merge branch 'master' of https://github.com/Micket/oofem
Fixed merge problem.