Exceptions now raise correctly and changed the import of the library. Now we import exceptions from ckan.plugins.toolkit
Added tests structure
Changed because of pep8 recommendations
Show scroll if exists an resources overflow in the widget

Signed-off-by: Miguel Angel Gordian <miguel.angel@codeandomexico.org>
Changed height of resources to fit at least 2 resources
changed background color for white
Changed the html structure of the widget to new layout.
Changed reference to organization image_url
additional information is erased
Changed ms height for organization image
Changed the top margin of the widget
changed the height of resource elements
Fine tuning in css for redesign
Added internationalization to widget template
Added wide widget template
Changed layout of logo for wide widget
Changed css to fit logo in wide widget layout
Changed to small widget
Added render of wide widget with parameter widget_type, it is rendered when parameter is named wide
Merge pull request #9 from CodeandoMexico/wide_widget_layout

New widget layout with image from the organization and new banner or wide widget layout

The widget now has two layouts: wide and default which is narrow.
To get the wide or banner widget you have to add the widget_type parameter in the URL with the value wide. (?widget_type=wide).

Also, a scroll bar was added to correctly visualize the resources.