Changes to disconnect from Mesos cluster when the Jenkins slave gets into TASK_LOST state
Bump version of mesos and protocolbufs

Conflicts:
	pom.xml
Implement a new "Container Image" option for use with Pluggable Containerizers

Conflicts:
	src/main/java/org/jenkinsci/plugins/mesos/JenkinsScheduler.java
	src/main/java/org/jenkinsci/plugins/mesos/Mesos.java
	src/main/java/org/jenkinsci/plugins/mesos/MesosCloud.java
	src/main/java/org/jenkinsci/plugins/mesos/MesosComputerLauncher.java
	src/main/java/org/jenkinsci/plugins/mesos/MesosSlave.java
WIP
fix container image input box
set container correctly