- fix lack of request context in VCS type events
we now use a dummy request but it's sufficient for routes generation
- cleanup and re-organized some code
- removed all pylons stuff from the events code
* added db migration for integration table, version 55
* added integrations views/templates/models
* added slack integration
* added h.url.current() support for pyramid only contexts
* added issues extractor for commit messages
* renamed repo-deleted/repo-created to repo-delete/repo-create
* removed marshmallow
* added serialization for events to static dicts of data
* added lazy_ugettext for translation of start time string