commit before merging and branching to classy
Merge branch 'classy' of https://github.com/aleaf/SFR into classy
Merge branch 'classy' of https://github.com/aleaf/SFR into classy

Conflicts:
	SFR_classes.py
added intersect_contours (preproc for ElevsFromContours)
added sfr_plots.py; class for plotting stream profiles by COMID