Avoid warning for possibly non-existing file
Pass CFLAGS, CXXFLAGS, LDFLAGS when building SuiteSparse
Use CXXFLAGS in CFLAGS for SuiteSparse

CFLAGS are used for building C++ code in SPQR.
Fix documentation for trsv and trsv!
Revert "Avoid warning for possibly non-existing file"

This reverts commit 9c3cd028ac4267f00464c1495678cbc219529ea3.
Avoid make warning for possibly non-existing file
Remove tab to avoid emacs warning about makefile syntax
Merge branch 'JuliaLang-master'
Merge branch 'make-warning'

Conflicts:
	Makefile