Update for MyBB 1.8

- jQuery implementation
- basic methods dah-bla
BUMP to 1.8

- Bump version to 1.8.
- Better group/forum selects.
- Adds a default custom reputation during install.
- Fix issue with xThreads first post templates.
- Removes unnecessary settings.
Merge pull request #15 from Sama34/develop

Develop -> Master 1.8