(#1386)
Added normal support for full-width (CJK etc) and composite (using diacritics) characters.
IMPORTANT: WINPORT API changed in binary incompatible way in order to implement this.
(#1100)
* separate wxWidgets code into dedicated far2l_gui.so library (touch #912)
* fallback to tty if far2l_gui.so not found
* eliminate std::* from backend interfacing and use simple versioning for it instead of hashing code and compiler settings