Developer profile page

for [galaxy/#16](https://github.com/cvan/issues/16)

+ Added routes for developer/{slug}
+ Added view and template for developer profile
+ Added macro for developer heading and Images
+ Initial developer template uses new part of user search to get company info (see [pull/#72](https://github.com/cvan/galaxy-api/pull/72))

**Todo**:
+ [ ] Show games from developer (Waiting on new game storage changes and [galaxy-api/#79](https://github.com/cvan/galaxy-api/issues/79) )
+ [ ] Change avatar to company image (see [galaxy-api/#73](https://github.com/cvan/galaxy-api/issues/73))