Enhance created version.txt

[t-b]

• Fail DAQ if it could not be written
• Add the current branch, also for the release package

[t-b]

If it could not be written we currently output

•CA_FlushCache()
•print getmiesversionAsstring()
  Could not determine the MIES version.
  Possible reasons:
  - Borked up installation, please use the installer again.- If you are using a git clone, please ensure that you followed
the manual installation steps correctly, and ensure that files and
folders must *not* be copied but a shortcut must be created.
  unknown version

so this seems to work.