Contributing file updates python 2.7 instead of 2.6 + a few other syntax consistency edits (#851)
Contributing file updates python 2.7 instead of 2.6 + a few other syntax consistency edits (#851)

* Fixing minor misspelling in Contributing.md file

* Updating CONTRIBUTING file to reflect python 3.x

* Support for Python v 2.7 edits

* Consistent capitalization  of Python

* Adjust python support version

geopandas/geopandas,jdmcbr/geopandas,jorisvandenbossche/geopandas,geopandas/geopandas,jorisvandenbossche/geopandas,jorisvandenbossche/geopandas,jdmcbr/geopandas,geopandas/geopandas