Allow syncronous Plugin init() methods to compile

Remove automatic guild storage sweeping, add method for manual sweeping

Truncate help command list to just command names if too long

Prepare 2.6.0 release

Prepare 2.5.7 release

Prepare 2.5.6 release

Prepare 2.5.5 release

Prepare 2.5.4 release

Prepare 2.5.2 release

Prepare 2.5.1 release