Merge pull request #623 from Atheros1/master

add missing import
Merge pull request #624 from Atheros1/master

changed the Chinese translation of 'Chinese' to the simplified version
Merge branch 'master' of github.com:Bitmessage/PyBitmessage into modifyWindowsTCPCheck
Increment version number to 0.4.2
minor change to new function isOurOperatingSystemLimitedToHavingVeryFewHalfOpenConnections