Fixes #1563
Fixes #1564
Remove message ID from clientQueue when clearing the message from the cache

Fix for this issue: https://github.com/Atmosphere/atmosphere/issues/1566
Fixes #1569
Fixes #1572
More fixes for #1572
Fix regression added earlier today
Fixes #1578
Fixes #1579
Fixes #1582
[maven-release-plugin] prepare release atmosphere-project-2.1.4
[maven-release-plugin] prepare for next development iteration
Fixes #1588
Remove hack for early Tomcat version
Do not allow reloading the AsyncSupport from init-param
Fixes #1596
Improve documentation
Fixes #1603
Fixes #1602
Fixes #1590