delta character bitmaps
translation files updated

-delta added to VCSWFUNC
-"Set" added to VFSWFUNC
PL translations- string lengths corrected
Delta character now requires en.h to go through translate.py
CMakeLists for en.h
Fixes #756
Merge pull request #761 from opentx/dvogonen/fix_756

Fixes #756
A few new splash screens for Taranis
Merge pull request #759 from opentx/mhotar/LS_delta_character

Mhotar/LS delta character
Issue #757 fixed
Search & Replace CUSTOMSW by LOGICALSW
Rename continued
Merge branch 'next' of https://github.com/opentx/opentx into bsongis/Issue524_SPORT_GPS
Units in all languages