Merge master into development

[coveralls]

Pull Request Test Coverage Report for Build 274

• 41 of 148 (27.7%) changed or added relevant lines in 4 files are covered.
• 4 unchanged lines in 2 files lost coverage.
• Overall coverage decreased (-2.04%) to 81.426%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
pysheds/rfsm.py	20	28	71.43%
pysheds/grid.py	17	116	14.66%
<!--	Total:	41	148	27.7%	-->

Files with Coverage Reduction	New Missed Lines	%
pysheds/grid.py	1	83.78%
pysheds/rfsm.py	3	83.5%
<!--	Total:	4		-->

Totals
Change from base Build 245:	-2.04%
Covered Lines:	2021
Relevant Lines:	2482

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💛 - Coveralls