ARM: Added support for hard float architecture.
Fix, do not byte_compile Python2 scons files with Python3.

* It doesn't byte compile with Python2 then, which is not optimal, but
  not much of a drama.

* This corrects Issue#153.

* Also minor cleanups.
Debian: Corrected changelog
New hotfix release.
Merge branch 'hotfix/0.5.5.3'
Merge tag '0.5.5.3' into develop