automtatic package import versions disabled by default
implemented qualifiers based on bnd configuration hash

This helps circumventing caching issues when changing bundle configurations,
e.g. in Eclipse or Maven Tycho when resolving an Update Site, where the updated
configuration may not be avaialble due to a cached bundle being used.
The changed version should help with that.
added option to adapt symbolic names in platformaux

if auxVersionedSymbolicNames is set to true, all bundles created
in platformaux will have adapted bundle symbolic names that include
the module version.
changed hash qualifier prefix for better readability