Add new Dropwizard views module - Trimou (extensible Mustache implementation)

Trimou is an open source Mustache implementation focused on extensibility and configurability. There are some useful built-in extensions: CDI, Servlet, PrettyTime, Minify and google-gson. It also has a decent test coverage and documentation. Since 1.5.0 Trimou defines a helper API inspired by Handlebars project.

See also http://trimou.org