Implement Equatable to OSC types

[segabor]

Support message equality check on both OSCMessage and OSCBundle types. There is also minor caveat. Int types are automatically converted to Int32 during serialization.

Based on this, the two following message won't be equal (but they should)

let msg1 = OSCMessage(address: "/s_new", args: "sine", 100, 1, 1 )
let msg2 = OSCMessage(address: "/s_new", args: "sine", Int32(100), Int32(1), Int32(1) )

So I think this issue should be addressed before implementing Equatable protocol.

[segabor]

Currently a non-issue, will be reopened once gains any attention.