JERSEY-1633: Server-Sent Events not working in GlassFish 4 (b68)

- added servlet-based SSE example.

- fixed some TODOs in SSE around using SseFeature.

- fixed blocking of SSE client when running SSE server on a servlet container that was introduced by recent changes related to introducing MVC support.

- ignored sse-item-store-webapp integration test due to SockectExceptions

- Patch 7: ChunkedInput change reverted

- Patch 8: fix of test

Change-Id: I9498e77ff32f22640e176856fc6c6371e2562c64
Signed-off-by: Marek Potociar <marek.potociar@oracle.com>
Make Jersey JDK6 compatible.

Change-Id: Ife703b15bbf7a271856f72360c7cb1815dbb6115
[maven-release-plugin] prepare release 2.0-m13

Change-Id: Id3d0dac79d7b5cf7b46b8423d9c8df44cf3ba538
[maven-release-plugin] prepare for next development iteration

Change-Id: Ieae3d73331d84c77c3b791d05b6742e1b1148ae1