RefactorDW Code

- Fixed unit tests after extension for media file refactoring
- bug fixing

- Added support for links to media files that use curly braces: {{...}} instead of [[...]]
- Links to media files now get normalized: all braces are substituted by curly braces: {{...}}
- Added some unit tests

- resolved todos related to media file handling
- extended unit tests so that media file links using {{...}} are checked as well as normal links.
This will cause some tests to fail, but its an overall improvement, so I will commit this.

- Reactivated unit tests
- fixed some problems with new media file refactoring implementation
- added additional junit tests
- Removed (resolved some TODOs)

- repaired all unit tests that are still failing after adding media file refactoring support
- fixed some warnings

- Increased version number from 1.1 to 1.2a

- Added new feature idea
- Added --enableassertions to JUnit test execution in CI build

- Proceeded preparing new feature: media files are now included in models and interfaces.
- added additional unit tests
- various refactrorings
- fixed most unit tests

- Proceeded preparing new feature: media files are now included in models and interfaces. Goal is
to include media files in refactoring
- added additional unit tests
- various refactrorings

- prepared new feature: media files are now included in models and interfaces. Goal is
to include media files in refactoring.
- RefactorDW now checks if host OS is compatible before executing any refactorings
- added additional unit tests
- various refactrorings