[NX-408] Add nexus karaf branding
removed uneeded instructions
Refine welcome banner a wee bit
[NX-408] Refine branding, add ssh branding, pending how to test this
Merge pull request #654 from sonatype/NX-408-nexus-karaf-branding

REVIEW: [NX-408] Add nexus karaf branding
[NX-243] disable unset plugin-info details
Align ehcache-default.xml with current default Nexus ehcache.xml
Prepare for reworking of Nexus ehcache.xml custom configuration
NX-485: refactor plugin configuration to re-use Sisu's BundlePlan
Cleanup extender
Extra test client protection against null reponses
Decouple NexusServletModule from rest of nexus-core
NX-485: unpick nexus core uber-bundle
Bump sisu-resource-scanner version to pick up bundle with sisu index
Cleanup duplicate javax.mail and other related bundles
Use getResource to check for existence of plexus XML in plugins
Clean up boot activation
Use TCCL to deserialize persisted objects from H2