Added genome validation.  Added module loading with minor validation.  Added required file detection in modules.

Added download script.  Updated job yaml.  Updated module yaml.  Add executable loading to workflow code.  Updated database validation for new inputs.

Updated yaml_job validation.  Added workflow validation for modules, yaml_jobs, and run files.  Added wrapper scripts for some commands.

Added initial yamlJob class.  Added tester file for individual tests.  Added missing command entry to bwa_align_paired.yaml.  Added internal configuration