update CHANGELOG
Merge pull request #142 from ianshward/v0.2.5-changelog

release 0.2.5?
[dist] 0.2.5
Update README.md

typos.
Merge pull request #146 from jpalardy/patch-1

Update README.md
[fix] Corrected the maxkeysize #153
[test] Reformatted the tests, 2 space indent