unification of persistence and transaction handling for jbpm and human task
documentation: Various minor corrections and updates.
documentation: Additional minor corrections and updates (as suggested by laune).
Merge pull request #58 from vinodkiran/master

documentation: Various minor corrections and updates to KIE
 - updating image in docs for correct update site url
[DROOLS-381] allow to explicitly remove a KieModule from the KieRepository
Improved and fixed the security docs