fixed bracketing and initialized recess module to make RECESS work

fixed indentatoion

updated package.json with grunt execution

updated travis config to install grunt-cli

changed RECESS to LESSLINT and specified less files to lint

updated paths according to actual locations

excluded font-awesome form css linting since it produces a lot of warnings

excluded webxray.css since it is not mantained by mozilla

fixed bower

forgot comma

xtra bracket

changed path of font-awesome

excluded hint.css from linting since it is not maintained by Mozilla

excluded the entire bower directory from linting

specified stylesheets path

moved rule from css to less

put duplicated images, properties in order and porvided fallback color

fixed typo