prevent shiro session creation

fixes #314
fix disconnected check and rename the method

issue #332
show node connectivity status when disconnected

fixes #316
show used indices in search results. fixes #337
restructuring and some changes to logged out pages and disconnected page
some changes to the disconnected page
add an app global timezone

change various helpers and partials to support <time> tags (needs some javascript to have nicer relative hover text)
use helpers instead of custom formatting in disconnected and sidebar
we actually honor timezones, remove warning

issue #228
volles javascript voraus!

link between configured and discovered nodes with pulsate madness.

issue #316
use proper cursor on node link hover
fix NPE when timezone is missing
per user timezone support

falling back to web interface default (JRE default or UTC)

fixes #228
work on namespace metrics. #342
disable login when disconnected

link to disconnected page
re-check connected state every second while on login screen
get metrics per namespace of node #349
work on metrics browser #349
work on metrics browser #349
filter for metrics browser #349
actually redirect when already authenticated on /login
prefilter for metric #349