Last_rank & reset_votes commands & some fixes

1) Added last_rank command.
2) Added reset_votes command.
3) Fixed banner problem with create and update server in Server CP.
4) Added last_rank field to Server model.
Removed code generated by PyCharm.
Merge pull request #21 from byteme/master

Added 2 custom commands and fixed banner upload issues.
usercp implementation
Merge branch 'master' of https://github.com/ipri2013/l2ranking