add a first stab at an experimental PSKC output format

this is clearly a naive least-effort implementation..
relates to #4
implement secret key in base64 for logging

specifically for the pskc format
close the logFile when things change
register aboutToQuit() handler and call closeLogFile() there
write start and end of PSKC info
user serial:slot for Key@Id
add tokenLength formatter to get responseFormat correct
add CryptoModuleInfo with configSlot
fixup xml syntax
Update Link for Help and Discussion
fixup support link since it's no longer mail
move the support link to it's own line
switch the windows build to qt5
make sure the qtgui is writable
new picture for version 3.3+

with u2f logo
NEWS for 3.1.15
bump versions
drop some more debug stuff from qtgui on mac
rework mac build.

put the qt libs in lib/ and skip framework stuff.
Merge branch 'master'

Conflicts:
	YKPersonalization.pro