[master] make sure initial OP_READ is registered only once after Connection is established. So if OP_READ was explicitly enabled in user code during initialization - Grizzly won't try to register OP_READ again
[master] + fix the issue #1724
https://java.net/jira/browse/GRIZZLY-1724
"Extend Closeable interface"
[master] + fix the issue #1725
https://java.net/jira/browse/GRIZZLY-1725
"Associated Closeable with FilterChain processing"
[master] + fix the issue #1723
https://java.net/jira/browse/GRIZZLY-1723
"Create Connection.getMemoryManager() shortcut to Connection.getTransport().getMemoryManager()"
[master] + fix issue #1728
https://java.net/jira/browse/GRIZZLY-1728
"configurable content-type in response on error"