Merge pull request #2 from oryol/master

WebSockets support
Fixed compilation warning.
ClientPortable and ManagerWin8 initial commit
Added .nuget and build.cmd
Fixed tabs, removed unused EventArgs and comments
Fixed polling from null timestamp

Start polling from server timestamp if null timestamp passed
Fixed polling in ManagerWin8
Merge remote-tracking branch 'remotes/oryol/master'
Added ability to disallow automatic network creation.
Fixed client/device services disposing
Merge branch 'master' of http://github.com/devicehive/devicehive-.net
Added UserID field to device commands.
Added creator UserId to DeviceCommand class
Binary protocol implementation added