humanize spec title when using send & record
apidocs: keep try mode state when navigating
apidocs: improve readability of examples list
apidocs: fix: don't send query param when undefined or empty
apidocs: some UI improvements: focus first field and keyboard shortcut
in ResourcesRoute, try to load resources from sources in DEV mode

this make admin UI development easier, no need for the build tool to
copy resources from sources to classpath to get the changes.

 this is especially useful for development with IDEA, where Make is
 usually a bit long, and required when you change only a few resources.
remove servlet 3 requirement  (Issue #15)
factory: introduce factory of factory concept and alternatives support
apidocs: reload specs examples from sources in dev mode