update to bootstrap 2.x and render the bootstrap less on the server-side
use graph name as a permalink
use bootstrap-responsive design on dashboards
refactor graph rendering into a separate graph partial
use graph_column configuration setting to adjust the graph's span class
Added support for overwriting the defaul graphite backend in the dash.yaml

Conflicts:
	README.md
	lib/gdash.rb
	lib/gdash/dashboard.rb

minor correction
Merge pull request #62 from falkenbt/feature

Added support for overwriting the default graphite backend
fix default argument value causing syntax error
Add a script to validate dashboards.

This script validate that all the categories contains a description (the `dash.yaml` file), and that all the `.graph` files can be parsed with `GraphiteGraph`.

When a new graph is created, if there's a syntax error in the graph description, the application will be unable to display it.  If the dashboards are stored in some kind of repository, before pulling them to the server, or before pushing them, this script can be run to validate that the graphs can be loaded by `GraphiteGraph` and that all categories contains the dash description (e.g: a git hook, Jenkin's job, etc.)
Exit with a status code of 1 when an error occurs.
No need to manipulate the library path.
Merge pull request #64 from franckcuny/tools

Add a script to validate dashboards.
several changes for clean merge of pr 49