Release 0.5.11

And update Checklist (there is no configure.in and Makefile.am anymore).

Release 0.5.10

Merge pull request #134 from snogge/readme-no-autotools

Do not refer to the Autotools files in README

Release 0.5.8

Release 0.5.7

Release 0.5.6

Add cl-lib package dependency

Release 0.5.4

Update the checklist

Released 0.5.2