Enhanced CacheControlPlugin to support HEAD requests as well as GET.
[maven-release-plugin] prepare release PluginExpress-Parent-0.1.5
[maven-release-plugin] prepare for next development iteration
Updated README for 0.1.5 release
Merge branch 'HEAD-support-cachecontrol-plugin'

Conflicts:
	README.md
	cache-control/pom.xml
	cache-control/src/main/java/com/strategicgains/restexpress/plugin/cache/CacheHeaderPostprocessor.java
	cache-control/src/main/java/com/strategicgains/restexpress/plugin/cache/DateHeaderPostprocessor.java
	cache-control/src/main/java/com/strategicgains/restexpress/plugin/cache/EtagHeaderPostprocessor.java
	cors/pom.xml
	metrics/pom.xml
	pom.xml
	routes/pom.xml