Many language fixes.

Many language fixes.

Removed TODO's.

Added documentational content.

Removed most pictures which are no longer required.
- also this slows down loading of the application on "slow" links.
- pictures were not that good anyway.

Property panel is now also applicable.

Fixed:
#387  	FeatureBrowser is full of descriptions saying TODO
#337  	FeatureBrowser: Source tabs in "features" that do not have source
#374  	FeatureBrowser: When opening a feature with no properties, hide propertypanel (on Java)
#395  	FeatureBrowser: Hide non-working features
#375  	FeatureBrowser: Should start from welcome (?) and select it from tree

svn changeset:674/svn branch:toolkit