precompile.php command accepts css_dir argument.
Added HTML generator mode.
Added site generator.
Added two options:
  - insertOGPTags
  - showTemplate
Improved menus.
Improved page navigations.
Fixed QR Code url bugs.
Supports separate default directories.
Merge branch 'feature/html_generator' into develop
Updated README.
Ready for version 0.7.
Merge branch 'release/0.7' into develop