Create a new source from a hash representation

@param name [String] The name of the source @param opts [Hash] The properties to use for the source

@option opts [String] :remote The git remote for the given source @option opts [String] :basedir The directory to create environments in @option opts [true, false] :prefix Whether the environment names should

  be prefixed by the source name. Defaults to false.

@deprecated @return [R10K::Source::Base]