Merge pull request #612 from avelino/master

Replicate orrection #611 0.12 to master
Help text for commandline usage
Request #425: Support HTTP PATCH method as per RFC-5789
Testing PyCharms code inspection.
Fix example

On the rebase() example, disable escaping on the evaluation of "base".
Merge pull request #615 from hjalves/patch-1

Minor fix in the documentation
fix #616: Json content-type not restrictive enough

Possible security issue. See https://github.com/defnull/bottle/issues/616 for details.
Added 3.4 test environment to travis config
fix #567: In python 3.4 multipart file upload breaks due to change in cgi.FieldStorage
Added python 3.4 to tests
loaded plugins run via command line, ref #619