Merge pull request pysal#1243 from sjsrey/2.6.rc2

2.6.rc2

Merge pull request pysal#1240 from sjsrey/2.6

2.6.0rc1

Merge pull request pysal#1227 from sjsrey/2.5.0

[REL] 2.5.0 changelog

Merge pull request pysal#1218 from sjsrey/2.4.0

2.4.0

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