Merge "*** FIRST VERSION OF CI BUILD SCRIPT *** - Provides build cache management...

Merge "*** FIRST VERSION OF CI BUILD SCRIPT *** - Provides build cache management to a remote location - Provides automatic cashe repopulation - See /fuel/ci/README - Rebased to master - Bug around cache handling fixed - New option -r introduced to invoke external script/program instead of standard http(s)/fttp get and put, eg. scripts or programs to integrate with dropbox, or similar. The script needs to anheaer to curl argument list. - Stefan Berg's comments implemented - Fatih Degirmenci's comments implemented with one exemption: the revision state   .iso naming convention still remains the same - we need to discuss this. With   the implementation of Fatih's comments the build.sh argument structure is slightly   changed, please see ./build.sh -h"