Merge pull request #8 from strongbox/SB-203

SB-203
#SB-207: Make the StorageBooter prevent duplicate initialization

Applied fix.
Merge pull request #9 from strongbox/SB-207

#SB-207: Make the StorageBooter prevent duplicate initialization
Upgraded Jetty to 9.2.1.v20140609.
Generate sources artifacts.
Indexing related cleanups.
Merge branch 'master' of github.com:strongbox/strongbox
Upgrade Jersey to 2.10.
Made the Jetty plugin use the start goal, instead of run.
Upgraded to maven-invoker-plugin 1.9.
SB-137