Major rework

- Make it possible to compile with synApps_5_7 instead of synApps_5_6
  (but except the compilation not much testing had been done)
- Use StreamDevice-2-6
  (but the patches from PSI should be applied)
- When the wget fails (or is interrupted by CTRL-C),
  there had been a half fetched and useless file on disc.
  Avoid that by downloading into a tmp file, and when the doenload
  is complete, rename the file.
- Patch all the RELEASE filesto match our location
- Remove the makeok which was there to save some compiltaion time,
  but made the whole make unreliable
- Adjust motor.h from to work correctly with ARM processors
  (See http://www.aps.anl.gov/epics/tech-talk/2014/msg00812.php)
- Other improvements

This script has been intensivly tested on a Raspberry PI using Raspbian,
and under Debian Linux running x86.
There are good chances that it works under Ubuntu, Scientific Linux (or similar)
or Mac OS X.