started work on remove_regressors and csv reading as input
Merge branch 'master' into csvfile

Conflicts:
	lib/statistics.cpp
added reading/writing text files as images
Merge branch 'master' into csvfile

Conflicts:
	lib/statistics.cpp
added tests for txt write, still fail though
Throw an error for setOrder of mismatching dimension images, had to fix
several image functions for this. Retabbed mrimage, ndarray.cpp
Merge branch 'csvfile' of github.com:MicahChambers/npl into csvfile

Conflicts:
	lib/statistics.cpp
Merge branch 'master' into csvfile
Merge remote-tracking branch 'origin/csvfile' into csvfile

Conflicts:
	lib/mrimage.cpp
reading and writing txt images works (and tests work)