remove third-party content from repository

public/Makefile.am

public/font-awesome/HELP-US-OUT.txt

public/font-awesome/css/font-awesome.css

public/font-awesome/css/font-awesome.min.css

public/font-awesome/fonts/FontAwesome.otf

public/font-awesome/fonts/fontawesome-webfont.eot

public/font-awesome/fonts/fontawesome-webfont.svg

public/font-awesome/fonts/fontawesome-webfont.ttf

public/font-awesome/fonts/fontawesome-webfont.woff

public/font-awesome/fonts/fontawesome-webfont.woff2

public/font-awesome/less/animated.less

public/font-awesome/less/bordered-pulled.less

public/font-awesome/less/core.less

public/font-awesome/less/fixed-width.less

public/font-awesome/less/font-awesome.less

public/font-awesome/less/icons.less

public/font-awesome/less/larger.less

public/font-awesome/less/list.less

public/font-awesome/less/mixins.less

public/font-awesome/less/path.less