Added include wrappers for standard c++ headers.  Each include of a standard header should be done through these wrappers.
All identifiers starting with an underscore, e.g. _x are changed to x_.  I.e. the underscore moved to the end.
For identifiers starting with underscore the underscore was moved to the end.
Solved conflicts in merging

Merge branch 'public' of https://github.com/michael-lehn/FLENS into public

Conflicts:
	cxxblas/level1/asum.doc
	cxxblas/level1/axpy.doc
	flens/examples/tut04-page04.doc
	flens/lapack/he/trf.tcc
	flens/lapack/he/tri.tcc
	flens/lapack/la/laev2.tcc
	flens/lapack/la/lasr.tcc