Merge pull request #12 from lincolnloop/features/better-storage

Start exposing Redis types in the Plugin storage interface
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.
fixes tests after Nicolas' change was reverted
Merge branch 'master' into features/better-storage