adds support to CPK Data Sources Listing in CDE Editor

CPK Endpoints are grouped by Plugin Id.

remarks:

- added new dependency, guava-14.0.1.jar (putted at
server/plugin/dev-lib/guava-14.0.1.jar)
Merge branch 'master' of https://github.com/webdetails/cde

Conflicts:

server/plugin/src/pt/webdetails/cdf/dd/DashboardDesignerContentGenerator
.java