Fixed mail link and added gfm parser to index graphic
Updated version number and release notes
Removed whitespace
Updated manual page
Fixed travis config after prawn update
HTML <textarea> elements are now also parsed as block level elements, fixes #147
HTML <u> elements are now recognized as span level elements, fixes #144
Add GFM, markdown and PDF options to help text
Fix word usage in math block syntax
Fix redundant regular expression
Updated line number support

* Added line numbers to more elements
* Added line numbers to all warning messages where possible
Updated version, release notes and homepage
Merge pull request #1 from gettalong/master

Upstream update