Add an OpenTSDB datasource.

This adds support for querying OpenTSDB for metric data.
Reload filters when loading page

This commit refreshes the dynamic filters when loading page.
Merge pull request #310 from roidelapluie/master

Reload filters when loading page
Revert "Merge pull request #310 from roidelapluie/master"

This reverts commit 9fc93e285c7f13817a8f22aebaccb6e5e7d2da40, reversing
changes made to 30bf838065928872adbecc979eb67265b8560253.
Support for async scripted dashboards, and accesss to jquery, window & document, Closes #274)
unbind resize event during slideshow
Add support for multiple hosts (with retries) and raw queries.
Merge pull request #323 from magicrobotmonkey/slideshow_leak

unbind resize event during slideshow
updated readme
version bump to 1.5.3
updated changelog
Added rounding for graphites from and to time range filters
  for very short absolute ranges (Fixes #320)
Merge branch 'influxdb-updates' of github.com:influxdb/grafana into influxdb-influxdb-updates
influxdb editor: rawquery text input, changed from fixed pixel width to span10 class
added support to coustom where conditions
Merge branch 'master' into feature/influxdb-add-where-conditions

Conflicts:
	src/app/partials/influxdb/editor.html
	src/app/services/influxdb/influxdbDatasource.js
Added where condiction operators
Added conditions management
Added labels per series management
better variable naming