fixes #226

Sometimes Eureka only provides only the securedhealthUrl for the service.
Previous to this commit the applciation won't be registered in that case. So
with this commit the securedHealthUrl from Eureka is used, when available

fixes #224

With this commit urls form the /info endpoint are deteceted and rendered as
links.
The downside is to make that work I had to drop the collapsible info section in
the overview list and replaced it with an resizable/scrollabe <pre> section.

Don't refer to fonts.googleapis.com for the fonts so that using the ui behind a
corporate proxy isn't such a pain anymore.

fixes #213

Checks the DiscoveryClient's services on each heartbeat and removes all
services, which are no longer registered.

fixes #214

fixes #205

Use the metadata for health-/managament-url in the default service conversion.
This allows custom health- and management-path per application.

fixes #205

fixes #205

... since we use webpack.

Adds an application view that displays a list of
Liquibase migrations as retrieved from the /liquibase Actuator
endpoint. The module is conditional on this endpoint being
available.

otherwise it gets mixed up whith the standard html title attribute

Adds an application view that displays a table of
Flyway migrations as retrieved from the /flyway Actuator
endpoint. The module is conditional on this endpoint being
available.

Fixes gh-206