Bower (#225) related stuff

Removed package.json dependencies - some of them were invalid. Might rethink whether we want this to be npm package.
Updated devDependencies - array for devDependencies was a deprecated syntax, switched it to hash.
Took non-ember related dependencies from bower - this way we can minimize third-party code directly checked in in our codebase. Though due-to bower not having latest version of ember we're getting via curl, ember-related stuff to stay in repositary for little longer.