[filters] added filters extension category
[filters] added options hash to run()
[filters] added category test and options tests
[filters] safe_run() error class and backtrace, thank you @jgoldschrafe!
[filters] codeclimate gem doesn't work w/ ruby 1.8
Merge pull request #3 from portertech/feature/filters

Added filters extension category and run() options={}
minor version bump, filters and run() options