Making line-wrapping consistent within README.md.
Making line-wrapping consistent within README.md.

Most paragraphs hard-wrap lines; this adjusts those that didn't.

geoffbacon/semrep,HBClab/NiBetaSeries,INCF/pybids,ramansbach/cluster_analysis,emaudes/bha,arokem/shablona,geoffbacon/semrep,mfalkiewicz/diffusion_embed,mekman/recon,ritviksahajpal/pygeoutil,christiancarballo/bha,ramansbach/cluster_analysis,ramansbach/cluster_analysis,neurohackweek/avalanche,xgcm/xrft,rabernat/xrft,HBClab/NiBetaSeries,ritviksahajpal/LUH2,ritviksahajpal/LUH2,uwescience/shablona,ramansbach/cluster_analysis,HBClab/xnat_BIDS