add total documents/data stored per node on cluster overview

also, dropped load in favor of cpu usage also display as a progress bar

closes #95
adding tooltips for cpu usage / heap usage

also fixing old error, where max heap displayed was actually the commited heap
hide closed indices on analysis page

closes #103
add a confirm dialog before publishing a gist

closes #104
fix cpu usage / heap usage  for 0.90.0

closes #102
Create check for unexpected response format

closes #100
more css cleanup
fixes node heap usage tooltip for old 0.90.X versions
hide docs / size for non data nodes

closes #105
added theme support

closes #89 closes #74
small changes to dark style
fixed background for confirm dialog on dark theme
removed hover style from cluster health table
fixes text color for confirmation dialog
tuning dark theme for json content colors
tuning dark theme for ace editors
version bump 0.5.6