Small fix to graphite target controller to still revert to text box for expressions with multiple series that do not use a series reference

Templating: Full support for InfluxDB, filter by part of series names, extract series substrings, nested queries, multipe where clauses! Closes #613

Templating: Ability to use template variables for function parameters via custom variable type, can be used as parameter for movingAverage or scaleToSeconds for example, Closes #262

Templating: Interval variable type for time intervals summarize/group by parameter, included auto option, and auto step counts option.
Closes #243

Fixed so white theme looks good with new search and editor panes, Closes #735, and other small fixes and polish

updated change log with info about InfluxDB breaking changes, and fixes for stacked series and missing values, Fixes #534, Closes #743, Fixes #673,Fixes #674, Closes #756

Work on fixing stacking issues with InfluxdB, added fill(0) and fill(null) option to InfluxDB query editor, also a panel wide group by time option that supports setting a low limit, Fixes issues #673, #674, #534, #743

Fixed issue where a metric request error would set panel error flag, which would cause unsaved changes service to detect change, and prompt the unsaved changes warning. The panel error state is now moved to the panelMeta object that is not part of the dashboard / panel model, Closes #745

Small fix to graphiteDatasource and sending cacheTimeout undefined, reintroduced this bug yesterday, added unit test so it should not appear again

Dashboard: View dashboard json, edit/update any panel using json editor, makes it possible to quickly copy a graph from one dashboard to another.
Closes #304

Removed collapse row button, added to row menu, made small change to text pannel to allow smaller height, Closes #727

Fixed small issue where dashboard search did not work after loading dashboard and it does not exist, now shows a valid dashboard

Added better match when using graphite function autocomplete, hit tab key and the first match will be used, you no longer need to use the down arrow to select the typeahead match you want, just hit tab key