Remove private flag in package.json.
Add missing API function to README.
Add installation section to README.
Fix syntax error in example.
Match messages to transactions.
Add EventEmitter.listeners function.
Add Heap_Protocol.__push function.
Fix issue with matching messages to server transaction.
Refactor building transaction match string.
Add transaction state machine.
Transport.send set only sent-by parameter in Via header.
Set state to terminated on transport error.
Add transaction timeout timers.
Add retransmission and termination timers to transactions.
Send ACK for non-200 final responses.
Use reliable transport for transaction module tests.
Send 100 Trying by transaction layer.
Add server responses retransmissions.
Emit error event on transport error.
Rename Transaction attributes.