feat(gulpfile): allow livereload server's port to be configurable through command line arguments
chore(*): update README.md
chore(*): remove demo files

Demo will be available at http://spa-ko.crissdev.com/
fix(gulpfile): set IS_WATCH flag when watch task is running to prevent removal of compiled files

The clean task was executed every time a file was changed, thus removing compiled files
and causing the browser to display no content when the page was reloaded.