improved install to local repo with version.override
changed version of maven extension to 3.0.5, some cleanup
reverted version back to 0.2.0, renamed files
generate buildnumber while reading pom files
fixing test only happening in jenkins
adding a custom lifecycle mapping class for version.override
tweak changes in readme.md
tweak changes in readme.md
tweak changes in readme.md
more detailed examination of the groupId, new configuration option to only override version which is equals
custom install plugin can be disabled, changed pom version
Merge remote-tracking branch 'origin/version.override-with_maven_install-2.4' into version.override-with_maven_install-2.5

Conflicts:
	maven-core-extensions/pom.xml
	maven-core-extensions/src/main/resources/META-INF/plexus/components.xml
	plugins/dependency-attach-plugin/pom.xml
	plugins/install-custom-version-plugin/src/main/java/ch/rotscher/maven/plugins/InstallWithVersionOverrideMojo.java
	plugins/install-version_override-plugin/pom.xml
	plugins/pom.xml
	pom.xml
merged from other branch, cleanup in core extension