Adding AWS ClientConfiguration to support EC2 access via HTTP PROXY
Adding http proxy host & http proxy port support
adding properties for http_proxy_host & http_proxy_port
Adding release notes for 1.6
Updating release from 1.5 to 1.6
Merge branch 'feature/http-proxy' into develop
Updating for 1.6 release
switching from string to integer
Fixing the bug: AWS nodes were not getting refreshed. Instead it was throwing NullPointerException.
So Added missing ExecutorService object
Merge branch 'master' of https://github.com/patelgaurang83/rundeck-ec2-nodes-plugin into patelgaurang83-master

Conflicts:
	Readme.md
Correct version to 1.5-SNAPSHOT
Add proxy username/password settings (via BaronVonJ)
Merge branch 'patelgaurang83-master'