Fixes #37 (#38)

Some small adjustments to the codebase

Some states now have null statecodes (for example Aland Islands), we ignore populating statecode maps for this now

Rebuilt location4j.bin

Fixing working directory for maven commands in build.yml

Updating README.md

Merge pull request #20 from jottinger/master

Adds location check by classloader, adds spotless for google-java-format, adds lat/long search for city

Adding maven deploy to location4j module

Merge pull request #12 from tomaytotomato/1-immutability-of-results

1 immutability of results

Updating release