[misc] ensure 'missing' is checked out as LF

[dos] add missing locale name for CP-720

* Closes pbatard#640

[loc] minor update for Swedish translation

[misc] fix VS2015 warnings when compiling ms-sys for x64

* Closes pbatard#637

[loc] add Serbian (Latin) translation

[loc] update Romanian translation

* Closes pbatard#636

[ui] fix UEFI/BIOS mode never being disabled once enabled

* Closes pbatard#635
* Also fix minor logic issue and trailing whitespaces

[usb] fix detection for some Innostor UFDs

[core] add a cheat mode to zero the USB device

* Alt-Z to zap!
* Also set rufus-next to 2.6

[loc] update Lithuanian translation to latest