Merge pull request #3 from phildowney/master

Basic Tweet Validation
- Pulling into master branch.
- This code will be enhanced later.
- Updated Twitter plugin; additional twitter users can be followed with !follow <twitter username>
- Fixed some code style issues.
- Added more friendly messaging when trying to follow a Twitter user fails.
- Reduced message delay to 250ms to speed up multi-line messages.
- Fixed example configuration file.
Added ability for multiple triggers, validation   that a trigger we've developed is being called (others are ignored), used, and added !unfollow.
Tidied up code, fixed a string comparison issue.
Merge pull request #6 from phildowney/master

Added code for multiple triggers, implemented unfollow.
- Added Google HTTP client library.
- Added Reddit plugin for automatically posting links to Reddit.
- Fixed warning in Twitter plugin.
- Added additional configuration for Reddit Plugin.
- Added nice error warning when Twitter credentials are not provided.

Notes:
- This code is a pretty quick hack. I'm going to get back to it later.
- Fixed invalid POM.
- Added JSOUP for HTML parsing.
- Reddit links are now posted with the title of the link's page.
- Added BitCoinPriceChecker plugin for echoing the BitPay API to the channel.
- Actually load BitCoinPriceChecker plugin...
- Removed bot interface and replaced it with a concrete class.
- Added Guice for DI.
- Fixed regex for parsing arguments for a plugin.
- Added logging library.
- Added configuration class.
- Updated example configuration file.
- Renamed configuration file to qwobot.xml.
- Added system property for setting config file location.
- Fixed some warnings.
- Refactored plugin system. See plugins package for details.
- Added default twitter file.
- Updated existing config file.
- Disabled reddit pugin (not fully functional).
- More refactoring.
- All plugins should work now.
- Added triggers for changing tweet color.
- Fixed Reddit plugin login bug.
- Added Reddit anti-spam.
- Fixed (again) Reddit login.
- Added additional filters to the Twitter plugin.
- Updated user agent string for Reddit Bot.
- Added Tweet filter so that the bot only echoes tweets from people we're actually following.
- Fixed broken JSON definition for Reddit posts (it was sending "subreddit" instead of "sr")
- Added rate-limiter to Reddit plugin to comply with their API rules.
- Reddit links are now posted in a separate thread.