Updating dxpy.find_projects (#219)
Updating dxpy.find_projects (#219)

The api exposes a field to the findProjects method to filter by region.  Adding this field
to our dxpy.find_projects helper to do likewise.
dnanexus/dx-toolkit,dnanexus/dx-toolkit,dnanexus/dx-toolkit,dnanexus/dx-toolkit,dnanexus/dx-toolkit,dnanexus/dx-toolkit,dnanexus/dx-toolkit,dnanexus/dx-toolkit