Merge pull request pysal#1213 from sjsrey/2.4.0rc1

Update changelog instructions

Merge pull request pysal#1209 from sjsrey/2.4.0

Update changelog building and grab spopt from conda-forge not pip

Merge pull request pysal#1191 from sjsrey/2.3.0

2.3.0

Merge pull request pysal#1189 from sjsrey/subpackages

Subpackages

Merge pull request pysal#1158 from sjsrey/2.2.0

2.2.0

Update CHANGELOG.txt

Merge pull request pysal#1077 from sjsrey/master

REL: 2.0.0

Merge pull request pysal#1069 from sjsrey/rel2.0

enh: updated mgwr and spvcm

RELEASE: 2.0rc2

Merge pull request pysal#1051 from ljwolf/master

Final legacy release of PySAL