A Genomics Alliance Beacon, see http://ga4gh.org/#/beacon


* REST endpoint cgi-bin/beacon/info:
    Shows info about beacon, e.g. number of variants served.
    No parameters


* REST endpoint cgi-bin/beacon/query:
    Parameters:

      - chromosome: 1 - 22, X, Y or M
      - alternateBases: A,C,T,G or I or D.
      - position: position on chromosome. Depending on the default configuration, you need the optional parameter [positionBased]

      - dataset: Optional. If not specified all datasets will be queried.
      - reference: Optional. If specified, has to be GRCh37
      - format: Optional. If "text",  does not return JSON, but just one of the words "true", or "false".  Easier to parse for shell scripts.
      - positionBased: Optional. Type of nomenclature of the requested chromosome position. You can define the type of nomenclature used in the [position] parameter.
              Values: 0 or 1

              Important !!! : 1-based is the format that is stored the position on chromosome
                               is the DEFAULT format that the sistem use to the position on chromosome