#22 Fix mixed line endings

[Christopher Head]

Most files had LF line endings but some were CRLF. Change them all to LF. This will make it easier to use automated tools in future (such as futurize for Python 3 support) because the diffs will show only what really changed, rather than every line in the file.

[Jérome Laheurte]

Properly "hg import"ed this time :)