add utility method to join non-null values of array
add new address helper
use new address helper
whitespace
Merge pull request #172 from goodybag/172-address-formatting

Derp Address when address is null
rename facebook-login-button to btn-fb-connect for consistency
pull css for button internals out into buttons.less
missed two references to old name
separate sprite class from other css class
fix active state to match design
Merge branch 'master' into 186-fb-btn-active
Merge pull request #186 from goodybag/186-fb-btn-active

facebook button active state
Merge branch 'master' into 160-backbone-explore