Updated README.md with installation instructions
Updated README.md with test task instructions
Updated csslint to accept adjoined CSS classes
Added buttons
Simplified the CSS needed to disable a button
Added support for the :focus state
Removed :focus CSS code as it wasn't needed
Added Open Sans font
Some font related adjustments
Forced text color for <button> tag
Font declaration now use the bulletproof @Font-Face syntax
Fixed indentation
Cleaned whitespaces
Added a .editorconfig file
Added a dark version of the button
Added block state
Added a gulp task to copy fonts and changed 'build' task
Added new font for headers
Call clean task before building anything
Updated README with new tasks