Improve dataTables integration within the app:

- Manage lib through NPM
- Move portal / Bootstrap files back to the itop-portal-base module (not managed through NPM yet)
- Fix SCSS classes for the backoffice as it was based on the bootstrap CSS classes which are not there anymore

Note: jQuery is included as a dependency, will check with the team if we can force it not to be retrieved

node_modules/jquery/src/var/rnothtmlwhite.js

@@ -0,0 +1,8 @@
+define( function() {
+	"use strict";
+
+	// Only count HTML whitespace
+	// Other whitespace should count in values
+	// https://infra.spec.whatwg.org/#ascii-whitespace
+	return ( /[^\x20\t\r\n\f]+/g );
+} );