The codebase was transferred from ForkBB rev. 68.
Added PunBB support.

Supports (convert/merge):

1. ForkBB rev.42 - rev.68
2. FluxBB_by_Visman rev.51 - rev.84
3. FluxBB 1.5.0 - 1.5.11
4. PunBB 1.4.4 - 1.4.6