(TK-80) Update dependencies

Update all dependencies to the latest version. Use
clj-http-client instead of clj-http.
(TK-80) Use webrouting service

Change the template to use the webrouting service instead of
the webserver service.
(TK-80) Address PR comments

Update config.conf so that the hello-web-service is pointed
to in the webrouting configuration. Fix bootstrap.cfg to
correctly boot the webrouting service. Move TK Jetty9 dependency
up into the main dependencies. Switch back to clj-http.
(TK-80) Bump dependencies

Bump dependencies for compojure and TK Jetty9 to the latest
versions.
Merge pull request #2 from fpringvaldsen/TK-80-dependency-update

(TK-80) Update dependencies/use webrouting service