Improved index resolving efficiency

Instead of getting all indices in the cluster and the filter what we need, we try to resolve the indices we care about.
add an option to sort the stat panel results by label or value
Fix for persistent tooltips on histogram markers
Merge remote-tracking branch 'bleskes/selective_aliases' into selective_aliases
Show load and save options by default, even when on an invalid dashboard
add sortable headers to the stats panel result table
fix header alignment
Make histogram y-axis formatting aware of the tick size when formatting

kbn.byteFormat & kbn.shortFormat take an extra min_resolution param that indicates what size should be still be distinguishable despite the formating. For example if `min_resolution=100` and we fromat 1100 with `decimals=0`, the output will still be 1.1K . This is used in y_axis formatting to make sure the legends are able to correctly display a change of the current tick size.
Fixed spacing of derivative text, shortened transition delay for row buttons
Check if time_series bucket already exists, if it does, add to it. Closes #816
Histrograms should use the count search type when they only rely on facets.
Always show the refresh button

If one sets auto reload to 10m, it may still be handy to be able to refresh. Especially so because reloading the page would loose the current dashboard if not saved.
Add support for version suffixes (like RC1 & Beta) to esVersion parsing & comparison
Merge remote-tracking branch 'bleskes/hist_search_type_count' into boaz
Merge remote-tracking branch 'bleskes/y_format_sensitive_to_tick_size' into boaz
added new *./_aliases proxy match for nginx and apache sample config files; fixes #811
refresh was called twice with every timer expiry

Also unpacked  dashboard.set_interval to simplify logic a bit.

Note: set_interval used to call refresh() when called. This is un-expected when setting a long refresh interval.
Merge remote-tracking branch 'bleskes/double_refresh' into boaz
Fix linting
Correctly compute mean/min/max on histogram intervals larger than the index interval