Pfam domain type should be integer

[leexgh]

For example EGFR pfam domain from ensembl_biomart_transcripts.json.gz:

  "domains": [
    {
      "pfam_domain_id": "PF14843",
      "pfam_domain_start": 505.0,
      "pfam_domain_end": 636.0
    },
    {
      "pfam_domain_id": "PF01030",
      "pfam_domain_start": 361.0,
      "pfam_domain_end": 480.0
    },
    {
      "pfam_domain_id": "PF01030",
      "pfam_domain_start": 57.0,
      "pfam_domain_end": 167.0
    },
    {
      "pfam_domain_id": "PF07714",
      "pfam_domain_start": 713.0,
      "pfam_domain_end": 965.0
    },
    {
      "pfam_domain_id": "PF00757",
      "pfam_domain_start": 185.0,
      "pfam_domain_end": 338.0
    }
  ],

PFAM domain value should be integer instead of float.