adding some minor notes for LU
Merge remote-tracking branch 'upstream/master' into develop
copied some gmatrix_row funs to gmatrix_col; added some LU notes
Merge remote-tracking branch 'upstream/master' into develop

Conflicts:
	contrib/libfloats/TEST/test_LUPdec.dats
Merge pull request #8 from bbarker/master

some gmatcol_foreach functions