Export developer and method-timestamp

[simonfranz]

For better teamwork it would be easier to log also the creation timestamp and the creator of each Method,
If you are not working with the same manager, it is useful for both code-export and code-import to know when the method was last edited by which developer. You can even activate this in ENVY that for every method the current developer is logged, so listing in an export would also be useful.

Thanks in advance

[eMaringolo]

@simonfranz , if a developer loads from Tonel, and then writes again to Tonel, the same method would have a different timestamp even if there was no change, causing an "artificial" difference in the commit.

Modern git tools tell you which user last modified some line of the file, wouldn't that work?

[eMaringolo]

After some internal discussion we thought this would be good if done together with #49.