add server.xml config
add new versions of ruby in .travis.yml
update build matrix#
update README docs for secure_proxy
config inherits params instead of include
fix params issue
update local variables in config
update server.xml template \w scope.lookupvar
drop support for 2.7.0, related to #2
Merge pull request #2 from antonlindstrom/feature-configure-server-xml

Feature configure server.xml