Fix iOS 7 bug where the close map button is hidden behind the navigation bar.
Refactor map hiding/shrinking methods.
Merge pull request #15 from exister/master

fix crash when table is empty;
added convenience method for setting the x,y point for custom map close button
added block for close button
added option to override default action of close map view button
added notes
Merge pull request #16 from Hoya/master

added convenience method
Add "auto center on user location" property.
Merge auto-center feature.
Merge auto-center feature.
Update README.
Remove old images. Update README.
Update podspec and README.