see their associated data in a mostly readable format
remove specific plugins, or all of them
when plugins are removed, their permissions are now also removed
any dapp permissions to interact with the plugin remain unaffected (should they?)
improved plugin teardown on removal (listener removal etc.)
misc
I had to mess with the controller init order, but this should be considered beyond the scope of this PR, as it will be addressed in the larger plugin installation flow PR at some other date
Fixes #50