Add luapower as interpreter

[jjvbsag]

LUA POWER the LuaJIT distribution for Windows, Linux and OS X

can be found at https://luapower.com/

What I did: Add luapower.lua to zbstudio/interpreters as

dofile 'interpreters/luabase.lua'
return MakeLuaInterpreter("power", ' power')

and

path.luapower = 'C:/bin/luapower-all-master/bin/mingw64/luajit.exe'

to my user.lua

This works fine for me, but I'm still verifying. Please review and if you like it, add it to zbs master