First git release of PT Assistant

Add Travis CI configuration for releasing to GitHub and sending trans…

…lations to Transifex

Patch by biswesh and me (floscher).

git-svn-id: https://svn.openstreetmap.org/applications/editors/josm/plugins/pt_assistant@34259 b9d5c4c9-76e1-0310-9c85-f3177eceb1e4