IDEA 12 project definition for easier development start.
Further .gitignores for the IDEA Project.
Get Unit-tests running.
Minor enhancements of IDE running tests/webappps
Fixed minor defects in the IDEA project

The YUI compressor library is no longer required/present.
Added some notes about starting development using IDEA & Ant.
Merge branch 'feature/idea-project' into 3.0.x

Provide a default IntelliJ IDEA IDE project.
For best results use the commercial ultimate edition,
but the community edition works fine as well an misses
only selected features.