added EventSource for java and sample projects
Ensured parenthesis in strings don't interfere in templates

Fixing #1419.

Ensured that when a String contains a closing or opening parenthesis and
is passed to a method, it doesn't cause the outer parenthesis for the
method to be considered closed.
update scaladoc
Merge pull request #1471 from nanop/play-json-scaladoc

update scaladoc
Logging the betty channel close event as a trace as this is frequent, and unnecessary to report.
Merge pull request #1419 from jroper/1420-template-string-parenthesis

Scala views generate invalid code for unmatched parenthesis inside a string
Merge pull request #1415 from huntc/disable-netty-ex-logging

Logging netty channel close is excessive
Merge pull request #1282 from nraychaudhuri/java_eventsource

added EventSource for Java and sample projects