Allow Custom themes directories

Add a way to specify a custom themes directory, will be used in daux serve and daux generate

Various improvements

• Broken links appear in red in the documentation instead of breaking in daux serve

GitHub

• Remove "fork on github" ribbon, add a link in footer instead
• Add an "Edit on GitHub" link on all pages

Fixes in search

Fixed relative links and search integration

Added daux command

Major changes

• Added a daux cli command to run daux, either with daux generate or daux serve
• Started to run unit tests in Travis-ci
• Add automatic table of contents feature
• Replace Twitter Bootstrap with home made styles, following the BEM convention
• Removed PHP 5.4 support

Bugfixes

• Front-matter wasn't working in some cases, use a real yaml parser

Initial Release

This is a first version to depend on a version instead of a branch