Handle division by zero in characters_per_second
Merge pull request #48 from felagund/cps_2

Handle division by zero in characters_per_second
Merge pull request #49 from felagund/master

Make SrtFile.encoding be set when autodetecting encoding
Merge branch 'master' of github.com:felagund/pysrt into py2-str
Fix conding style
pep8
Get rid of unused builtin_str
Add parent, previous and next properties to SubRipItem