updating stan-pr make target so it automatically merges
Merge pull request #9 from stan-dev/feature/issue-8-make-target-for-pull-requests

Fixes #8. updating stan-pr make target so it automatically merges
disable eigen asserts in makefile
Merge pull request #10 from stan-dev/feature/issue-7-disable-eigen-asserts

Fixes #7. disable eigen asserts in makefile
fixes #12
Merge pull request #13 from stan-dev/feature/issue-12-make-stan-pr

fixes #12
updated makefile for new doc and stan sub-module
updating Stan version