add repository class
more repository work
add object mapper utility class
DTO map classes
remove serialziation code from tilecook classes
remove more serializaiton code
use mocks and builders for testing
more tests and refactoring
add LayerBuilder to tests
Layer refactoring
more refactoring
more refactoring
fix tests
add layer zoom level validation
Set GridSet metersPerUnit default = 1
cleanup
add tests
Merge pull request #1 from kernelsanders/repository-pattern

merge epository pattern refactor branch