Tripped CircuitBreaker Wouldn't Close Under Contention

Fixes issue https://github.com/Netflix/Hystrix/issues/236
Merge pull request #250 from benjchristensen/issue-236-1_4

Tripped CircuitBreaker Wouldn't Close Under Contention
1.3.14 and 1.3.15
[Gradle Release Plugin] - pre tag commit:  '1.4.0-RC3'.
[Gradle Release Plugin] - new version commit:  '1.4.0-RC4-SNAPSHOT'.
Version 1.4.0 Release Candidate 3
Handling InterruptedExceptions in the HystrixMetricsStreamServlet

Some environments like spring boots embedded Tomcat interrupt the worker threads on shutdown. Interupting a thread is the Java way to politely ask it to gracefully stop doing long running things. Since serving an event stream is a long running thing, we should stop sending the stream and stop polling, whenever an InterruptedException occures.
Remove jsr305 Dependency

It was unnecessary ... trying to be as lean as possible to avoid conflicts.
Merge pull request #254 from benjchristensen/remove-jsr305-dependency

Remove jsr305 Dependency
Updated a img http link to https in the README.md

This removes a SSL error when viewing the readme on GitHub
Fix timeout race conditions
Unit test for timeout race
Merge pull request #256 from benjchristensen/timeout-race-condition

Fix Race Condition on Timeout
Merge pull request #255 from bramp/patch-1

Updated a img http link to https in the README.md
Merge pull request #253 from BGehrels/master

Handling InterruptedExceptions in the HystrixMetricsStreamServlet