Adds basic Jenkins plugin.
Jenkins doesn't expect a trailing slash.
adds code example for plugin configs
Merge branch 'master' of https://github.com/lincolnloop/botbotme-plugins
tidy up tests
cleanup docstrings
Merge branch 'master' into features/motivate-counts
Merge pull request #12 from lincolnloop/features/better-storage

Start exposing Redis types in the Plugin storage interface
Merge branch 'master' into features/motivate-counts
plugins don't need to be called Plugin anymore
fixed the tests
Update CONTRIBUTING.md
Revert "plugins don't need to be called Plugin anymore"

This reverts commit ae02310ce5005749c0d5cefba1c5d8cd110707d0.
Merge branch 'master' of https://github.com/lincolnloop/botbotme-plugins into features/motivate-counts
fixes tests after Nicolas' change was reverted