add exportConfig method and split out assembling the configuration
add exporting of otp
little bit more error-checking
same rules for export as write
implement export for oath and chalresp
drop old windows installer
add json dll for windows build
change around for logging to go by QFileDialog

With this the user has to select which file to log to
when the first write occurs.
solves #3
set filters for selected files
change around so the dll files come from the packed up zip
rework macx build to work with binary package of libykpers
simplify mac build
update instructions
use app sandbox on osX
merge two win32 blocks
include licenses in windows installer
add license files for osx
run productbuild instead of pkgbuild
for mac use config for_store to select appropriate certificates
add application category