Changes to example xml file plus some small tweaks

* ReadBuffData.cpp renamed to ReadBuffData.RevA.cpp to keep consistency
* Added calibration model 'off' for turning off the channel
* Condition det == det2 modified so addback monitoring spectra will work
  again
* Removed tags files from git tracking
Merge branch 'master' of https://github.com/kmiernik/pixie_scan

Conflicts:
	Config.xml.93br