Allows for the passing of CLI options to target

With this change, you can pass additional options to your execution
target:
<execution>
	<id>javascript tests</id>
	<phase>test</phase>
	<goals>
		<goal>grunt</goal>
	</goals>
	<configuration>
		<!-- Pass options to grunt -->
		<target>jasmine --no-color</target>
	</configuration>
</execution>
Merge branch 'grunt-cli-options' of github.com:mschnee/frontend-maven-plugin into grunt-cli-options