v0.4.0

What's Changed

• Add MSWEP data product and guide by @maawoo in #17
• Add missing MSWEP module by @maawoo in #18
• Use numbagg to calculate nanquantiles by @maawoo in #20
• General cleanup by @maawoo in #21
• Docs cleanup by @maawoo in #22
• Improve utility module by @maawoo in #23
• Add spectral indices how-to guide by @maawoo in #24
• SANLC 2018 by @maawoo in #26

Full Changelog: v0.3.0...v.0.4.0