valuehistogram: new simple, value-based histogram

This change adds a new valuehistogram panel to support value-based
histograms.  Unlike the previous histogram panel which plots the data
using fixed time-interval buckets, this type of histogram buckets the
data according to the values themselves.  This type of graph provides
a high-level perspective of a field's value across the entire time
interval.
Map Panel : Allow usage of term_stat facet

- Provide a way to choose the stat to display into the map, not only the total number of hits
but also min/max/total/...

- Provide the necessary config, taken from term_stat panel
- Reload the data when we change the config
add multifieldhistogram panel
rename chart directive to not conflict with histogram
remove bars, extend fields table, quesries->markers, improve default aliases
Upgraded angular, elasticsearchjs and elasticjs

Angular is now at 1.2.20
Elasticsearch JS now included
Updated to the latest elasticjs

This commit has been tested on our staging servers against our existing
reports.
Fixed issue with inspector not pretty printing the JSON output.
Merge pull request #1 from rob68/master

Fixed issue with inspector not pretty printing the JSON output.
Fixed bundling of kibana - missing new angular files.
fix scale and derivative in multifieldhistogram
bugfix: statisticstrend-chart
Adds refresh icon to kibana panels

Adds a simple naive refresh functionality. When the icon is clicked, a refresh message is broadcast down the panel's scope chain. All panels watch for refresh. This allows for panel level refresh at the user's request.
Adds missing semicolon
Adds another semicolon. 

I'm too used to working in CoffeeScript :).
support term_stats for map panel
Merge remote-tracking branch 'thegreenpizza/master'
Merge remote-tracking branch 'tvvmb/betterhistogram'

	new file:   src/app/panels/multifieldhistogram/editor.html
	new file:   src/app/panels/multifieldhistogram/interval.js
	new file:   src/app/panels/multifieldhistogram/markersEditor.html
	new file:   src/app/panels/multifieldhistogram/meta.html
	new file:   src/app/panels/multifieldhistogram/module.html
	new file:   src/app/panels/multifieldhistogram/module.js
	new file:   src/app/panels/multifieldhistogram/styleEditor.html
	new file:   src/app/panels/multifieldhistogram/timeSeries.js
	modified:   src/config.js
Merge remote-tracking branch 'jdve/histogram-values'

	new file:   src/app/panels/valuehistogram/editor.html
	new file:   src/app/panels/valuehistogram/module.html
	new file:   src/app/panels/valuehistogram/module.js
	new file:   src/app/panels/valuehistogram/queriesEditor.html
	new file:   src/app/panels/valuehistogram/styleEditor.html
	modified:   src/config.js
Merge remote-tracking branch 'tomcashman/master'
new readme