Use tabs for idents, small lint fixes

* make sure non-UP applications are shown at the top of the list  (closes #55)
* refinements for health-section
* remove-button for all apps
* fixed headers in details view

using Gulp & Browserify
with a little help from https://blog.codecentric.de/en/2014/08/angularjs-browserify

server.context-path not used when application registers itself #32
Typo in About #31

* registry-key is derived from URL
* option to specify a management-URL and other various config options see spring-boot-starter-admin-client/README.md
* less chatty registration
* some more test cases
* show application URL in overview and headline
* show application info in overview
* set HTTP-Codes in RegistryController

fixes #13
fixes #16
closes #17
closes #18

I didn't add the key-value-properties to the Application. Since it was somehow redundant to the /info-endpoint.

* fixed health display when application is DOWN

* Removed a bunch of useless CSS
* Prepared DI-usage for minification