Add change selectivity and growth functions and case parsing
Fix a variety of errors from adding change_sel and change_growth
Switch R1-cod example to -1
Merge branch 'develop'

Conflicts:
	DESCRIPTION
	R/create_argfiles.r
	man/create_argfiles.Rd
	man/run_ss3sim.Rd
Merge branch 'master' of github.com:seananderson/ss3sim