RefactorDW Code

- Improved exception message.
- Fixed broken regression test.

Fixed lots of CheckStyle, PMD and Eclipse compiler warnings.

- Updated CheckStyle to version 5.
- Added PMD.

Removed typo.

Tagging the very last commit from Manfred (June 23, 2009).

Created folder "tags".

Created folder "branches".

- file extension of wiki files (media files and pages)is now included in naming conflict detection
- fixed some bugs that have been caused by implementation of media file refactoring
- RefactorDW is able again to finish its run for the first time after implementation of media file refactoring

- fixed wrong name of main()
- Fixed bug in detection of relative and absolute links with curly braces
- added ignore clause for {{tag> ...}} links as they are no wiki file link
- added ignore clause for {{topic> ...}} links as they are no wiki file link
- added ignore clause for samba file share links: [[file://...]] links as they are no wiki file link
- OutOfMemoryError is now catched displaying a hint for using '-Xmx2048m'
- Adkusted log4j configuration

- Fixed all bugs that have been detected by unit tests since implementing new feature that refactors mediafiles as well as articles