Compiles with vibe-d 0.10.x. 

Fixes Bayes filter and deprecation warnings 

vibe.d 0.9.x compatibility, Unicode word length fix. 

Fixed resource depletion bug when used with vibe-core. 

Fixed compilation on latest vibe.d/DMD. 

Avoid assertion failure in Bayes filter. 

Add classification APIs to AntispamState. 

Adds a high-level API. 

Fixed Bayes filter. 

Adds safety annotations.