Revert "Revert "Include browser in the regular build.""

This reverts commit 9951be8741259c6029c81adf65a2844eadd2decf.
Bower doesn't need to run as part of the build.

All the components are checked in.
Pick up grunt from the local NPM modules so it doesn't have to be installed globally.
Clarify profile for activating browser build.
Browser project depends on Kernel for Version class.
Improved the build instructions.
Make Browser versioning consistent with the rest of Neo4j.
Move neo4j-browser into the org.neo4j.app group.
Merge pull request #1498 from benbc/2.0-merge-browser

Include browser in the regular build.