Clear active Channel subscribers when making a Channel private.

This behavior can be overriden in the configuration by setting
`config.keep_subscribers_when_private = true` in your Events.rb
initializer.

Addresses issue #72
Prevent the server from crashing when receiving uploaded files.

Currently uploaded files will just be treated as invalid events.

On the next release I would like to add support for uploading files
through the WebSocket connection utilizing the client dispatcher.
Bump version for release and update changelog/readme/todo-list.
Merge branch 'master' of github.com:DanKnox/websocket-rails
fix reloading of controller class in development. closes #78
fixing issue with reloading 'WebsocketRails::InternalController'
Merge pull request #80 from florianguenther/b-fix-development-reload

fix reloading of controller class in development. closes #78
Bump version and update CHANGELOG for release.