added support for Maven Central - The Central (Java) Repository for open source components
API documentation http://search.maven.org/#api
added myself to the list of contributors
added Maven Central to the list of supported services
Merge remote-tracking branch 'badges/master' into maven-central

Conflicts:
	server.js
Don't warn about a missing analytics file.
Typos.
Do not redeclare variable "versions".
Try to fix invalid versions.