docs: fix minor typos in README
chore: update npm deps
chore: add main-bower-files as a npm dep
chore: add gulp-sourcemaps as a npm dep
feat: add overrides in bower.json, for use with main-bower-files
feat: update gulpfile, for use with main-bower-files
chore: v1.2.0

use main-bower-files for bower deps handling
assets paths modified in all the project to reflect new assets locations