Minor reformatting in readme

This fixes the code example and also removes some trailing whitespace.
Favorite spot template skeleton
Favorite spots: add fields to model
Favorite spots: add name to form
Favorite spots: controller showButtons() and hideButtons()
Favorite spots: minor removal of property
Favorite spots: niceties in "new spot" UI
Favorite spots: move geocoding into its own function
Favorite spots: improve placeholders
Favorite spots: is the app mostly done?
Favorite spots: "Pin list" -> "Favorites list"
Favorite Spots is now called Location Manager
Location manager: add comments to onAddLocationTap
Remove another .architect file
Location manager: comments in Locations#onLocationTap
Location manager: comments in Locations#onListLocationsTap
Location manager: Locations#onBack comments
Location manager: Locations#onStart comments
Location manager: comments in show & hide buttons
Location manager: comments in Locations#onSaveLocationButtonTap