Merge pull request #19 from ericNdfw/master

JENKINS-13897 EC2 Userdata not being Base64 encoded
[maven-release-plugin] prepare release ec2-1.16
[maven-release-plugin] prepare for next development iteration
Added support for EC2 Tags, VPC subnet, VPC security groups, configuration idle timeouts and so forth
Added EC2Tag
Added missing files
Add the possibility to connect using private DNS name, for EC2 to EC2 instances communications
Merge pull request #21 from bguerin/master

Fix for JENKINS-14181 : Allow connecting to an instance using its private DNS name instead of its public one
Merged public/private DNS name flag in with Tags and VPC changes
Fixed formatting to house style
Merge pull request #20 from cormallen/master

JENKINS-14221 - Support VPC subnets, add support for EC2 tags
More defensive testing and checks for out-of-jenkins slave termination
Fixed bug caused by field masking
Fixed formatting style
Merge pull request #22 from cormallen/master

Fixes problems caused by EC2 instance termination outside of Jenkins
Clean up imports, add overrides
Merge pull request #23 from francisu/master

Clean up unused imports, add overrides
Add comment about this being a legacy class
Removed the "Jenkins" part from the plugin name
JIRA-14884 Resume Stopped Ec2 Instances