Merge pull request #30 from mnfienen/classy

Classy
premerge commit before bringing in Mikes latest
Merge remote-tracking branch 'upstream/classy' into hwrclassy

Conflicts:
	SFR_main.py
SFR Reach and Segment Objects
Merge pull request #31 from hwreeves-USGS/hwrclassy

Hwrclassy
Major refactoring!

FID --> FragID (always capitalized)

node --> cellnum (allways lower case)

Need to check up on it, and also need to incorporate Andy's elevation code