Extjs5

I ported the following examples to ExJS 5.0.1.
  - printform
  - printpreview
  - renderer
  - stylegrid
  - wfscapilities
  - wmscapabilities
  - tree -> WIP !

To get them running i edited the example-code and some src-code, too.

I couldn't finish the tree example, but did some commits nevertheless. It would be cool if someone could take a look at it. Same with the tree-legend.

The commits can include minor changes/cleanups..

Please review.