Merge pull request #12 from lmorchard/10-api-description-omitted

Fixes #10: Use a blank award description when omitted from API POST
Add DEFAULT_FROM_EMAIL to settings.
Merge pull request #13 from rlr/add-default-from-email

Add DEFAULT_FROM_EMAIL to settings.
Fluid images for liquid/responsive layout

Setting max-width:100% for inline images prevents them from overflowing their containers when the width changes.
Merge pull request #18 from craigcook/master

Fluid images for liquid/responsive layouts
Fixes #15: Switch to a locally hosted badge backpack image