set up AJP and RMI port
o Updated to latest Cargo snapshot which among various fixes brings in Jetty 8x support
o Added link to Cargo
Loosen up the version dependencies

This makes a few changes to the Manifest and Feature.xml to allow
for a looser version range.  Minimum is still required for 1.0.0 but
the upper range is less than 2.0.0.
o Updated embedded Jetty to 7.5.4
o Added embedded Jetty 8.x support
o Bumped version to 0.2.0-SNAPSHOT
o Restructured update site to allow for separate installation of embedded Jetty containers
o Added support for jetty-maven-plugin:8+
o Added about files
o Fixed site descriptor to mark Jetty add-ons as optional
o Fixed update site, needed a dedicated site feature to allow installation/update of webby core independently from add-ons
o Added support for variables in container home path, thereby making Webby launch configurations using installed containers sharable across team members
o Fixed support for Tomcat which got broken when updating to Cargo 1.1.0+ due to default behavior changes introduced by CARGO-963
o Bumped version to 0.2.1-SNAPSHOT
Updated to tycho:0.14.0
o use tesla 4
o not using TPs
o remove TP module
o add m2e catalog entry
o remove assembly plugin
o remove assembly descriptor