Support for Stare ADF frames with energy and time as integers

Stare firmware will produce data:crystal frames with the signals energy (and maybe core time) in int32 instead of the usual float32. We need a new version of CrystalFrame (v 2.0) to deal with this format. This version will be used to read data coming from stare cards, they should then be converted to CrystalFrame v 0.0.