Attribute support/information merge + support additional package actions

Per node informations can be passed via the node attributes. The data bag name
is configureable and the data bag is not needed.
The package data are now merged together before doing action.
The package actions :upgrade, :remove and :purge are also possible.
Chef solo should be supported - no search used.

Warning: You need to update your data bags to have the same beviour (false
means now remove not install any version. Use '' for that or true to upgrade
the package to the newest version).