Updating the metadata. (#3461)
Updating the metadata. (#3461)

Corrected final version for the user story.
The metadata has use for `antibody` column which is pretty major.
- It changes how the peaks are called (narrow, broad, or none)
lbeltrame/bcbio-nextgen,lbeltrame/bcbio-nextgen,lbeltrame/bcbio-nextgen