Avoid being able to instanciate a EFSSystem directly. Use DataDictionary.EFSSystem.Instance() instead
Allow to perform a synchronous compilation even when the background compilation task is not active (useful when the context indicates that it does not want background compilation)
Avoid duplicates in usages
Add all usages in the partially dereferenced expression
To be on the safe side. But it should never occur
Do not allow arithmetic operations between the type Any and anything
Do not allow arithmetic operations between the type None and anything
More traces when something goes wrong in the interpretation
Set the version number in the assembly info
Sort chapters (better looking)
Saved in new format (1 file per test frame)
Bug fix #274 : Change was not attached to the right element when considering lists
Bug fix #271 :
  - Avoid renaming reference to paragraphs while copying them
  - Do not rename elements when there is not duplicate name in the *target* collection
  - Forbid renaming of references to paragraphs
  - All traceability should be performed using drag & drop operations
  - Avoid null pointer exception
Merge branch 'motherERTMS/master'