Got the custom pop-ups working

Figured out the reason that my custom handler for generating the pop-ups for
POIs wasn't working, and roughed in the generation of the pop-up.  The bubble
auto-sizes itself for the size of the title, but not smaller than the size of
the buttons below it.  The buttons are the "More info" button and the "Share"
button.  The "Share" button is set up to be automatically disable-able (the
config code isn't there to actually make it dynamic yet), and not having the
button will resize everything accordingly.  The target of those two buttons is
not in place yet, so the "More info" button target is the next thing to put in.
Stand-in POI icons and code to use them

Added some stand-in POI icons so that I could iron out the code that sets the
icons based on the database type field.
Added the boilerplate code to be able to recieve APN push notifications.
Merge pull request #11 from agricocb/master

Another batch of commits working on the custom POI bubbles, POI icons, and APN support
Added the ConfigModel class for configuration management and save/restore

Added the ConfigModel class to the build and wove it in to the fabric of the
AppDelegate, which passes it to the MapViewController.  When I get the
ConfigViewController put together, it'll get passed in to there to be updated,
and hopefully when the MapViewController is loaded again, it will do its bit of
gathering config from the ConfigModel again.

The ConfigModel has code to serialize its data, which it writes to the
UserDefaults config area, so it's stored on disk as a .plist.
Merge pull request #12 from agricocb/master

Added the ConfigModel class for configuration management and save/restore
Merge branch 'master' of https://github.com/BarreForestGuide/iOS-app