Add releng component for building with buckminster

This enables mirroring of the p2.site using p2 actions from buckminster
This file also contians extra dependencies needed to build the bundles in this repo
Updates bundle versions to 2.6.1
Feature version set to 2.6.1
Changes version dependency for core to compatible
Make sure that the first line in the protein file is removed. Because
it's not read properly by the parser. This commit also removes an
out-print of the proteins to the console.
Merge pull request #1 from KlasJoenssson/2.6.1

Make sure that the first line in the protein file is removed.
Merge branch '2.6.1' into develop