SEC-2207: Update Gradle to 1.6
SEC-2195: Update Groovy, Geb, Spock, httpcomponents, and Jetty
SEC-2207: AspectJPlugin uses compileAspect and compileTestAspect
SEC-2217: Sonar Runner
SEC-2206: Gradle Propdeps
SEC-2209: add pom.xml
SEC-2214: Update Spring Version
SEC-2211: check.dependsOn integrationTest
SEC-2207: Trick Gradle Eclipse to import project and not the build folders
SEC-2207: Workaround for GRADLE-1116
SEC-2208: Use std docbook plugin and workspace cleanup
SEC-2097: Update integrationTestCompile to use optional and provided

Also update slf4j version and remove explicit commons-logging from pom generation