DOC update schedule
DOC updating release instructions
BUG: fix for #509
Merge pull request #510 from sjsrey/b509

BUG: fix for #509
DOC updating news
Merge pull request #507 from sjsrey/sched

Sched
Merge pull request #511 from sjsrey/docs

DOC updating news
Merge branch 'master' of https://github.com/pysal/pysal into viz
Missing keywords were causing failures in mapping_guide.ipynb
exploring cartopy
Merge pull request #512 from sjsrey/viz

Viz