Updated unqlite.dll to the latest version
Replaced clrZMQ interop with Nuane.Interop
Renamed unqlite.dll to unqlite32.dll and added 64-bit version as well.

--HG--
rename : System.Data.Unqlite/unqlite.dll => System.Data.Unqlite/unqlite32.dll
Added Linux 32/64-bit version of unqlite DLL