Resolve "Add download support for bam files"

Closes #5 (closed)

chipathlon/jobs/modules/download.yaml

-download:
-  - download_fastq:
-      inputs:
-        - url:
-            type: string
-        - md5:
-            type: string
-      additional_inputs: null
-      outputs:
-        - fastq:
-            type: file