fix for allowing special_type to be unset on a field.  plus unit tests.

Add bottom padding on delete modal

Fix caching issue with Angular partial

Fix nullpointer

fix link to users-guide

add a try/catch block to the code which introspects a Mongo collection so that if an unexpected exception is thrown we can catch it and have a nice stack trace while not affecting the sync of other collections.

Card error cleanup

Disable dragging dashcards when not in edit mode on mobile.

Resolves #2212

style tweaks.

add migration to fix any dashboard cards with NULL :row or :col values.

make sure we have a default value for `metabot-enabled`

XKCD Chart Easter Egg

New dashboard grid size + scalable cards + fullscreen + auto refresh

Metabot final touches

fix data reference scrolling

Merge branch 'new-dash-plus-scalable-cards-plus-fullscreen' of github.com:metabase/metabase into new-dash-plus-scalable-cards-plus-fullscreen