Display exercises available for nitpick in language track order #1720
Merge pull request #2108 from code-R/2091-nitpick-exercises-in-language-track-order

2091 nitpick exercises in language track order
Extend custom alert classes with bootstrap styling

This allows custom alert classes such as:
  .alert-notice
  .alert-error
  .alert-alert

To be styled by bootstrap as though we were using the standard classes:
  .alert-info
  .alert-danger
  .alert-warning
Merge pull request #2110 from bluerogue251/fix_mute_flash_message_styling

Fix flash styling
Use problem slug rather than relying on related exercise
Refactor stats page for clarity
Don't require login to look at stats
Add irc channel to README
Fix typo
Merge pull request #2111 from seanhussey/patch-1

Fix typo
Style notifications with a Bootstrap row

Fix cascading bug of each delete link appearing further to left

Make styling more semantic using classes and separate stylesheets
Merge pull request #2114 from bluerogue251/style_notifications_as_row

Style notifications with a Bootstrap row
Explain workflow in contributing document
Tiny refactoring of UUID setting

Remove tiny duplication of the functionality of Exercism.uuid
Explicitly return `true` from before_create callback as per:

http://stackoverflow.com/questions/4735141/rails-3-do-i-need-to-give-return-true-in-a-before-save-callback-for-an-object
and
http://blog.teksol.info/2010/09/28/unintented-consequences-the-pitfalls-of-activerecord-callbacks
Merge pull request #2117 from bluerogue251/tiny_uuid_refactoring

Tiny refactoring of setting user's uuid key