Add 2-D Lebail fitting, some bug fixes and PEP8 cleanup
What's Changed
- Fix conda version to 4.10.3, 4.11 causes a regression by @cjh1 in #357
- minor tweak to filtering by @joelvbernier in #356
- removed blank line by @joelvbernier in #358
- replace "_" with "" in the HM symbol. by @saransh13 in #360
- Lebail2d rebased by @joelvbernier in #361
- made master WPPF linter-happy by @joelvbernier in #362
Full Changelog: 0.8.15...0.8.16