Check-in to fix a few problems:

Check-in to fix a few problems:

* New pre-processor macro 'AliFMDDebug' which only ever evaluates it's
  argument if the debug level is high enough.  This is to remove
  'expensive' calls to 'Form' even if _NDEBUG isn't set.  This could be
  used generally if the core team chooses to do so.
* Fix 'policy' violations.
* Issue an AliFatal if calibrations are not found.  Previously it issued
  an AliWarning and continued using hard-coded calibrations.
* Add support for looping over kinematics tracks and getting associated
  hits in AliFMDInput.  This is to support background studies.
* Fixed problem in AliFMDRawWriter that meant that FMD1 data was never
  written to disk. I assume this bug was introduced when cleaning up
  compiler warnings.