Add line number links; Fix page width
Add link to citationstyles.org
Add success/fail alerts; add source header
Validate on button press
Validate against selected CSL schema version
Clean up old validation results
Hide source code block at page load
Erase source code block and header between validations
Add parseResponse function, reindent JS

(used http://www.dirtymarkup.com/ )
Validate against URL
Add support for textarea validation
Add support for file validation
Fix line highlighting alignment (adjusts prism.css)
Merge branch 'master' into gh-pages