Fixed installation dependencies, instructions

* rd_ui/package.json:
  * Add missing bower, grunt-cli dependencies
  * Take grunt from HEAD, as 0.4.1 has broken dependency: https://github.com/gruntjs/grunt/commit/08a3af53ffe9a0fcb15102088f7407120bd5a397

* README.md:
  * Update instructions
Take specific grunt commit (that fixes gh-886)
Merge pull request #36 from shayel/master

Fixed installation dependencies, instructions