meter widget (fix datapoints support) #91
use sprockets JST to handle templates 

* removed inline template hack
* simplified test setup
make dashboard column count configurable
add better_errors gem
fix graph target browser #BUGFIX
preliminary "native" graphite widget #80 #104 #93

* select widget "graphite" to play with it
* uses more recent graphite-web SVG format API
* embeds SVG as-is (sets background to transparent)
* you can use all supported graphite functions

known problems:
* width/height settings are hacked together
  for a two column, 1 row graph
* the svg/css needs fine tuning 
* error handling needs improvements
refactor javascript
update angular-ui library
initial
fix rake task
initial
handle non existing form field #BUGFIX
updgrade jquery.gridster #BUGFIX
http_proxy for graph widget fixed #BUGFIX
same behaviour again as in angular 1.0 #BUGFIX
add hint for database config setup #105
update angular.js to RC2
fix widget delete bug
update_interval * 1000 for widget polling
support 1, 2 and 5 sec update interval