Update copyright.
Add new keys to Info.plist
Merge branch 'master' of github.com:andrejv/wxmaxima
Update translation.
Merge branch 'master' of github.com:andrejv/wxmaxima
Merge branch 'master' of github.com:andrejv/wxmaxima
Merge branch 'master' of github.com:andrejv/wxmaxima
Merge branch 'master' of github.com:andrejv/wxmaxima
Added zh_CN from wxwidgets.