Don't build or link against libstan.a since it's no longer needed.
Merge branch 'develop' into feature/kill_libstan
Remove reference to linking against libstan that was missed.
updating stan to develop
Merge pull request #75 from stan-dev/feature/kill_libstan

Fixes #76. Remove libstan in cmdstan
Merge branch 'develop' into feature/call-makefile-from-anywhere

Conflicts:
	make/command
	make/libstan
	make/models
	make/tests
	makefile