Writing tests first
Finding nearby members by distance

Distance is now configurable
Units framework is there but it's not working yet
Fix tests for units in Members#nearby
Units: be less trusting of user input.
Rename local vars in tests for greater clarity.
Put locations in geolocated_member factory names.
Add a dropdown to select units on members/nearby.
Replace tabs with spaces.
Use km by default.
Make units dropdown wide enough to contain "miles".

It's now "miles" wide. Hehehe.
Be even more paranoid about params[:units]

And save a to_s call while we're at it.
Merge pull request #189 from pozorvlak/nearby

Find users within a given distance; allow specification of units.