Stop sharing Emitter

It's currently not possible to use multiple instances of SideComments on a page due to a shared Emitter. This creates a new emitter per SideComments instance to allow multiple independent instances per page to function.
Merge pull request #15 from Xorlev/multiple-side-comments

Stop sharing Emitter
Support for user profile / website urls.
Using local images for users.
Tests for the authorUrl.
Instead of mashing the currentUser's authorUrl into the postedComment, just emit the event with the currentUser's info.
Merge pull request #16 from aroc/comment-author-link

Allow optional author urls/links for comment authors
Whoops, forgot to update release js file.
Added minified CSS and JS to the release folder.
Minified version of the theme CSS.
Minified version of the theme CSS.
Merge branch 'master' of https://github.com/aroc/side-comments
Completely unacceptable commented out code in master. Buh!
Removing sad console log.
Closes #11 and cleans up input placeholder.
Fixing bug with grabbing comment text from the input.
Clearing comment box after submission. Fixing up some styles.
Putting theme related css into the theme and removing it from the base styles to make themeing easier.
Style fix for hiding the "plus" sign.
Bump bower version.