GSDEVTOOLS-9, adding plugin extension
GSDEVTOOLS-10 - applying subextension classes
GSDEVTOOLS-5
GSDEVTOOLS-3
Merge remote-tracking branch 'origin/core-0.2.0'

Conflicts:
	gs-jacoco/src/test/groovy/com/gersis_software/gradle/jacoco/GSJacocoPluginSpec.groovy
	gs-license/src/test/groovy/com/gersis_software/gradle/license/GSLicensePluginSpec.groovy
	gs-plugin-core/src/main/groovy/com/gersis_software/gradle/core/AbstractGSConfigurationPlugin.groovy
	gs-plugin-core/src/main/groovy/com/gersis_software/gradle/core/AbstractGSPlugin.groovy
	gs-plugin-core/src/test/groovy/com/gersis_software/gradle/core/AbstractGSPluginSpec.groovy
	gs-plugin-core/src/test/groovy/com/gersis_software/gradle/core/util/AbstractGSPluginSpec.groovy