use icomoon subset of fonts for icons instead of entire font-awesome set

_config.yml

_includes/download-snapshot.html

_includes/download-stable.html

_includes/footer.html

_includes/scripts.html

_sass/dynare.scss

_sass/font-awesome/_icons.scss

_sass/font-awesome/_path.scss

_sass/font-awesome/_variables.scss

_sass/font-awesome/font-awesome.scss

assets/css/main.scss

assets/fonts/font-awesome/FontAwesome.otf

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

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

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

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

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

assets/fonts/icomoon/icomoon.eot

assets/fonts/icomoon/icomoon.svg

assets/fonts/icomoon/icomoon.ttf