v1.5.0

Added ratpack-consul module with RatpackConsulConfig to read Consul K-V as ByteSource
Added ratpack-jdbc-tx module with support for DB transactions
Added Streams.fork()
Netty upgrade to 4.1.5.Final
Groovy upgrade to 2.4.7
Added Promise.retry
Added Promise.delay
Added Streams.take
Added Streams.concat
Conditional Functions and Actions
Composing ByteBuf publisher
Configurable ServerConfig.address
Lookup Handlers/Chains from Registry
Added Stream.batch
Added Execution.sleep
Deprecated Promise.wrap

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