switch to shared-grunt-config module

reduce the amount of config needed to setup an ui module to a minimum
by adding the new shared-grunt-config module as a dependency.

This simplifies upgrades very much, because they can be done via npm.
bump version to 0.6.0

this is quite a major change - most configuration is now located in an npm package
bump shared-grunt-config to v0.1.0 tag

point to the first version intended for public usage
bump version

another change, last one for now. I will leave it as is, for now