Revert "Not supporting older versions of jenkins anymore"

This reverts commit 2c5bc69040750e364c7da81eab5f4b02c6f98c02.
Dont attempt to copyfiles if plugin doesn't need to
[maven-release-plugin] prepare release DotCi-1.3.1
[maven-release-plugin] prepare for next development iteration
Remove obsolote method
Initalize templates during class initilization
[maven-release-plugin] prepare release DotCi-1.3.2
[maven-release-plugin] prepare for next development iteration
Initialize templates lazily upon first use
[maven-release-plugin] prepare release DotCi-1.3.3
[maven-release-plugin] prepare for next development iteration
Rename package
Revert "Rename package"

This reverts commit 8e950e6b8c20f2947f46f383defee79ccadb84dd.
rename install_packages package to remove conflict with class of the same name
Docker support
Merge branch 'master' into template_refactor

Conflicts:
	src/main/java/com/groupon/jenkins/DotCiPlugin.java
	src/main/java/com/groupon/jenkins/dynamic/buildconfiguration/template/InstallPackages/Clojure.java
	src/main/java/com/groupon/jenkins/dynamic/buildconfiguration/template/InstallPackages/GoLang.java
	src/main/java/com/groupon/jenkins/dynamic/buildconfiguration/template/InstallPackages/InstallPackages.java
	src/main/java/com/groupon/jenkins/dynamic/buildconfiguration/template/InstallPackages/Java.java
	src/main/java/com/groupon/jenkins/dynamic/buildconfiguration/template/InstallPackages/Node.java
	src/main/java/com/groupon/jenkins/dynamic/buildconfiguration/template/InstallPackages/Ruby.java
	src/main/java/com/groupon/jenkins/dynamic/buildconfiguration/template/install_packages/Clojure.java
	src/main/java/com/groupon/jenkins/dynamic/buildconfiguration/template/install_packages/GoLang.java
	src/main/java/com/groupon/jenkins/dynamic/buildconfiguration/template/install_packages/InstallPackages.java
	src/main/java/com/groupon/jenkins/dynamic/buildconfiguration/template/install_packages/Java.java
	src/main/java/com/groupon/jenkins/dynamic/buildconfiguration/template/install_packages/Node.java
	src/main/java/com/groupon/jenkins/dynamic/buildconfiguration/template/install_packages/Ruby.java
	src/main/java/com/groupon/jenkins/dynamic/buildtype/installpackages/buildconfiguration/plugins/DotCiPluginAdapter.java
	src/main/java/com/groupon/jenkins/dynamic/buildtype/installpackages/buildconfiguration/template/DotCiTemplate.java
	src/main/java/com/groupon/jenkins/dynamic/buildtype/installpackages/buildconfiguration/template/installpackages/Clojure.java
	src/main/java/com/groupon/jenkins/dynamic/buildtype/installpackages/buildconfiguration/template/installpackages/GoLang.java
	src/main/java/com/groupon/jenkins/dynamic/buildtype/installpackages/buildconfiguration/template/installpackages/InstallPackages.java
	src/main/java/com/groupon/jenkins/dynamic/buildtype/installpackages/buildconfiguration/template/installpackages/Java.java
	src/main/java/com/groupon/jenkins/dynamic/buildtype/installpackages/buildconfiguration/template/installpackages/Node.java
	src/main/java/com/groupon/jenkins/dynamic/buildtype/installpackages/buildconfiguration/template/installpackages/Ruby.java
	src/main/resources/com/groupon/jenkins/dynamic/buildconfiguration/template/InstallPackages/Clojure/.ci.yml
	src/main/resources/com/groupon/jenkins/dynamic/buildconfiguration/template/InstallPackages/GoLang/.ci.yml
	src/main/resources/com/groupon/jenkins/dynamic/buildconfiguration/template/InstallPackages/InstallPackages/.ci.yml
	src/main/resources/com/groupon/jenkins/dynamic/buildconfiguration/template/InstallPackages/Java/.ci.yml
	src/main/resources/com/groupon/jenkins/dynamic/buildconfiguration/template/InstallPackages/Node/.ci.yml
	src/main/resources/com/groupon/jenkins/dynamic/buildconfiguration/template/InstallPackages/Ruby/.ci.yml
	src/main/resources/com/groupon/jenkins/dynamic/buildconfiguration/template/install_packages/Clojure/.ci.yml
	src/main/resources/com/groupon/jenkins/dynamic/buildconfiguration/template/install_packages/GoLang/.ci.yml
	src/main/resources/com/groupon/jenkins/dynamic/buildconfiguration/template/install_packages/InstallPackages/.ci.yml
	src/main/resources/com/groupon/jenkins/dynamic/buildconfiguration/template/install_packages/Java/.ci.yml
	src/main/resources/com/groupon/jenkins/dynamic/buildconfiguration/template/install_packages/Node/.ci.yml
	src/main/resources/com/groupon/jenkins/dynamic/buildconfiguration/template/install_packages/Ruby/.ci.yml
	src/main/resources/com/groupon/jenkins/dynamic/buildtype/installpackages/buildconfiguration/template/installpackages/Clojure/.ci.yml
	src/main/resources/com/groupon/jenkins/dynamic/buildtype/installpackages/buildconfiguration/template/installpackages/GoLang/.ci.yml
	src/main/resources/com/groupon/jenkins/dynamic/buildtype/installpackages/buildconfiguration/template/installpackages/InstallPackages/.ci.yml
	src/main/resources/com/groupon/jenkins/dynamic/buildtype/installpackages/buildconfiguration/template/installpackages/Java/.ci.yml
	src/main/resources/com/groupon/jenkins/dynamic/buildtype/installpackages/buildconfiguration/template/installpackages/Node/.ci.yml
	src/main/resources/com/groupon/jenkins/dynamic/buildtype/installpackages/buildconfiguration/template/installpackages/Ruby/.ci.yml
use install_packages version as the default