HTTP_HOST, if present, should be used in preference to SERVER_NAME
feat(Request): Pass through relevant WSGI environ variables
refactor(Request): Reorder init statements
feat(Api): Add level 1 URI template support for path vars
feat(Request): Parse query params
Simplified
doc:Moved assumptions from readme to notes
Merge branch 'master' of github.com:racker/falcon
doc:Moved assumptions from readme to notes, and added contributing section to readme
feat(Request): Read request body

* Add body attribute to Request
* Refactor several tests to use assertEquals instead of assertThat
* Convert empty route to root route in Api.add_route
style(all): pep8 fixes

Address all pep8 style violations. A merge with master was also
conducted in this pull request.