ScriptedDashboard: datasource services are now available in scripted dashboards, you can query datasource for metric keys, generate dashboards, and even save them in a scripted dashboard (see scripted_gen_and_save.js for example), Closes #991

adding templating in opentsdb graphs

Merge branch 'opentsdb-counterMax' of github.com:rsimiciuc/grafana into rsimiciuc-opentsdb-counterMax

Tech: added cache busting for requirejs fetches, will only affect config.js for optimized builds, should solve user issues where browsers cache config.js which causes initial confusing setup/config issues.

Graph: multi series tooltip fix for long series names, and metric value row alignment, Fixes #983, #984

When get_data fails the legend should be cleared

Replace all $interval occurrences in query string

Add support for regex based series merging in InfluxDB

because template

Graph: series override dropdown menu select did not work after recent commit that added typeahead to this dropdown

Help: added help modal, accessed by shortcut '?', the help modal only contains a list of all shortcuts right now but will be extended in the future, #952