Re-organize nginx formula files

* Re-organize according to http://docs.saltstack.com/topics/conventions/formulas.html#writing-formulas
Merge pull request #5 from agoragames/reorganize-formula-files

Re-organize nginx formula files
Fix a filename and pillar key issue

* Ensure `common.sls` references correct template filename
* Use `pillar.get(...)` for message_do_not_modify with default
Merge pull request #6 from agoragames/fix-filename-and-pillar-issue

Fix a filename and pillar key issue
Fix source module iteration

* Fixing iteration for building nginx by source with respect
  to modules
* Adding `CHANGELOG.rst` and `VERSION` per https://groups.google.com/forum/#!topic/salt-users/zHguqsk-mds
Merge pull request #7 from agoragames/fix-iteration-add-changelog-and-version

Fix source module iteration
added gitignore
Merge remote-tracking branch 'upstream/master'
remove extraneous nrpe include
Merge pull request #9 from metamx/master

remove extraneous nrpe include (fixes #8)
move templates to the right place
Merge pull request #10 from metamx/master

move templates to the right place
Merge remote-tracking branch 'upstream/master'
Merge branch 'master' of github.com:grengojbo/nginx-formula