Version 0.8.0

First significant release of the Ronn-NG fork.

Changes:

• Added tables support. (apjanke)
• Lint & Rubocop fixes. (apjanke)
• Added --output-dir option. (apjanke)
• Support file names with periods in the name section. (apjanke)
• Migrated from Hpricot to Nokogiri. (apjanke)