basic authentication added for elasticsearch
Merge pull request #55 from oroce/elasticsearch-basicauth

basic authentication added for elasticsearch
refactoring, moved graph directive to a seperate js file
fixed small variable name issue with pull request #55 (jshint warning)
updated property docs in config.js
Make search support elastic search clusters with _all disabled.  Feature is disabled by default
Clean up, and set default in config to false
Dashboard search fix, only query against title field (Closes #51,Fixes #24)
Save now closes edit mode. (#52).
Fixes #46, you can now edit a graph with no title
Adding travis-ci build
added build status to readme.md
small change to readme.md
Fixes #45,  zero values treated as null values
began work on adding support for native graphite png renderer support (#22)
progress on translating grafana/flot options to graphite png renderer options
working on native png renderer support
added nonNegativeDerivative function
small fix to png rendering
Removed pointless setting "selectable" (interactive)