Saga 0.0.1 release

Major features

• Added saga log to persist all transaction/compensation events
• Supported compensation of all completed transactions on request failure in case of backward recovery
• Supported parallel processing of multiple transactions in a single request
• Supported parallel processing of multiple requests
• Supported transactions with sequence in a request
• Added forward recovery to retry failed transactions till success
• Supported transaction/compensation in terms of REST
• Added fallback support by REST in case compensations failed
• Supported service discovery for transactions/compensations/fallbacks with service center

Minor improvements

• Added travel agency demo to showcase how to use saga
• Added JMeter performance test script