Initial durations query panel
Closes #345
Merge pull request #349 from rashidkpc/master

Closes #345
Merge branch 'master' of https://github.com/elasticsearch/kibana into durations-event-graph
update durations panel
Update module
Add conditional formatting to durations panel
Update panel
Add first cut at query generation
Update refresh logic
Update durations panel with graph and legend
Add gitignore
Merge branch 'durations-event-graph' into pros-branch