Merge pull request #39 from paulpw/master

Fix for broken build of Maxcoin-Qt on linux
HARD FORK @ 167500
Moved back fork
HARD FORK @ 167500
HARD FORK @ 167500
hardcoded seed node
Updated QT versioning
Added NSIS installer
QR code support
Tidied up magic numbers
Translation error
Update build-linux.md
Added checkpoint @ 509750