Merge pull request #231 from topilski/master

Update min and max anchors in datesystem
Integer overflow protection in brute-force test
Date conversion tests cleanup
Unified placement order of Ok and Cancel buttons in dialogs
NSIS top logo images
Fixed incorrect text for OK button in ConnectionDialog
Merge branch 'master' of https://github.com/paralect/robomongo
Delete old not needed files, added QtUtils