* std::string -> qstring part 1
* more string migration
* more string migration ...
* ...
* more qstring mogrations
add sysinfo via json
* remove unneccessary includes
* integrate sysinfo into webui
* start ledclone
* led cloning: clone scan areas from original led
main: show exceptions, better exit
* tune json schema for new option. somwe cleanup
* fix warnings and bug for framebuffer selection. thx to clang brought by new osx buikld on travis
* make ledclone feature work flawlessly for effects too. Effect sees the ledstring without cloned leds.
cloned leds will be inserted just before sending to leddevice
additional: remove warnings and fix code style
* fix warning