Adding PeakFinder device plugin
Merge pull request #15 from teresa

Add PeakFinder.py file for tango device
Refactory for Maxipix.py
Add Bayer BG mode in LimaCCDs
Meta Maxipix for 2 modules:
  * finished cleaning up Maxipix.py
  * New camera plugin for MetaMaxipx 2x1 or 1x2
Merge branch 'master' of github.com:esrf-bliss/Lima-tango
 Now can read cooler and vacuum valve status and sensor working temperature as well
Merge remote branch 'upstream/master'