Fix source charset encoding issues

[thomasf]

• Fix broken encoding in SpecialSessionComponent.py that made git diff not work, example: https://github.com/hdavid/Launchpad95/commit/c42e22576490ca83a5246dca2a38e625b35d206d
• Convert all files to utf8-unix line endings, previously it differed from file to file.
• Add # -- coding: utf-8 -- header to all .py files. Should not make any difference but may help some editors/ides.

[hdavid]

thanks !