Bump: To version 0.1.2.1
This is identical to 0.1.2 except for addition of inverse_of.
Add: inverse_of option
removed the old tree file
Updated readme with markdown formatting
Converted plugin into a gem, people can now directly point to github …
…repo as gem
Tests needn't run within an app. Closes #9534 [lifofifo]
Fix acts_as_tree include
Fix generic file name in main load path.
Turned ActiveRecord::Acts::Tree into a plugin #9514 [lifolifo]