Improve readability of getText method.
Improve readability of getAddUrl.
Automatically handle DOM elements added after window.onload is called (class `buffer-share` has been replaced with the attribute `data-buffer-share`).
Fix example code
Replace **all** underscores with hyphens in getAddUrl
Refactor `init` code (add support for older browsers).
Fix event target retrieval for IE.
Add support for backwards compatibility
Merge pull request #3 from acoiro/master

Various improvements