basic support for tomcat 8

git-svn-id: https://svn.apache.org/repos/asf/tomcat/maven-plugin/branches/tc8.x@1617630 13f79535-47bb-0310-9956-ffa450edef68
formatting

git-svn-id: https://svn.apache.org/repos/asf/tomcat/maven-plugin/branches/tc8.x@1617631 13f79535-47bb-0310-9956-ffa450edef68
add contributor

git-svn-id: https://svn.apache.org/repos/asf/tomcat/maven-plugin/branches/tc8.x@1617632 13f79535-47bb-0310-9956-ffa450edef68
Merge remote-tracking branch 'upstream/tc8.x' into tc8.x

Conflicts:
	pom.xml
	tomcat8-maven-plugin/src/main/java/org/apache/tomcat/maven/plugin/tomcat8/run/AbstractExecWarMojo.java
	tomcat8-maven-plugin/src/main/java/org/apache/tomcat/maven/plugin/tomcat8/run/AbstractStandaloneWarMojo.java
	tomcat8-war-runner/src/main/java/org/apache/tomcat/maven/runner/Tomcat8RunnerCli.java