Adds Chapter 4 compliance and non-compliance checks
- Non-compliance test for latitude
- Adds Longitude non-compliance test
- Adds vertical coordinate C4.3 compliance checks/test
- Adds vertical coordinate compliance check/tests
- Adds 4.3.1 dimensional vertical checks/test
- Adds Appendix D regexes and test
- Adds dimensionless compliance and non-compliance checks
Adds checks for time variables
Merge pull request #3 from asascience-open/chap4

Adds Chapter 4 compliance and non-compliance checks