Central Package Barn Request API

PackageName: A valid Raven package name can contain lowercase letters and "." And "-" that do not precede and begin with.

VersionCode: A valid Raven package version consists of three numbers separated by two "."

request:
http://ravensc.com/install                             => Send back Raven installation script
request:
http://ravensc.com/<PackageName>                       => Return the latest VersionCode
request:
http://ravensc.com/<PackageNameNotExist>               => #f
request:
http://ravensc.com/<PackageName>/<VersionCode>         => Send back corresponding package by tar.gz archive file
request:
http://ravensc.com/<PackageName>/<VersionCodeNotExist> => #f
request:
http://ravensc.com/<AnythingElseWhatever>              => #f