WTS 0.13

The program's cross-platform portability was improved, all compiler- or
hardware-specific parts were separated and marked. Types were fixed,
allowing direct determination of types appropriate for particular
platform. All the moduli are in a good standing except for BT (external
communication) block. The block will be fixed in future releases by
separation into BTP  part (probably, it will be renamed into Safe Serial
Data Transfer Protocol) (universal library) and BT part itself.