Add title label to step title input
Don't default step title to "Step #"

Any saved step was getting a custom title set as "Step #" when it should just
be an empty string if they want "Step #"
Make sure there is a site object in APIService

Otherwise we'd be getting ifixit.com as a default all the time for the ifixit
app, which is fine unless we're doing dev work on a different server.
noPrerequisiteSteps changed to excludePrerequisiteSteps
Default new GuideStep's to an empty string
Clean up step edit list and list items

Also fixes "Add Step" from step list bug where it would just bring you to the
last step rather than adding a new one at the end of the step list.
Add save and cancel menu items to reorder CAB
User guide topic images were being recycled incorrectly
Move APIImage out of util and into model package
Update holoeverywhere to 1.5.0
Ensure both menu and add guide icons are in action bar
Get edit and create guide working with new wizard interface