Update Xcode project with new split test files

Implement new split tests

Add script to replace test data with that from the OLC project

Implement max code length behavior

Add tests to validate max code length behavior

Version bump to 3.0.0

Move SWIFT_VERSION definition in the project to the top level

Update swift_version declaration for current versions of CocoaPods

Make it clear in the title that Objective-C is supported

Apply Xcode recommended updates

Correct spelling of computeLatitudePrecision

When a full code is passed to recoverNearest, upper case it

Add test data to verify behavior of recovering full codes

Fix bug in computeLatitudePrecision

Fix floating point bug in encodeGrid