GeobearServer.java: enable Grizzly gzip and debug tracing
resources: make a maxmind directory
resources: remove v1 and v2 specific directories
pom.xml: Add amazon AWS SDK for S3 file access
GeobearDnsResolver.java: use more fully async bulk DNS API
GeobearJacksonProvider.java: remove unused code
GeobearResource.java: cleanup
GeobearResource.java: merge together GeoIP1 and GeoIP2
GeobearResource.java: unresolved domains in GeoIP, DNS resolution API
GeobearUtils.java: add some S3 GeoIP download support
MaxmindDb1.java: return empty map if no GeoIP result
MaxmindDb2.java: return empty map if no GeoIP result
README.md: add list of all APIs
GeobearDnsResolver.java: use only 2 DNS retries (max 10 sec. delay)