Merge branch 'release/0.2.3' into develop
Update version for development.
Fix incorrect handling of :setup and :cleanup on goals.
Update .gitignore to add target/.
Make perforate automatically set *warn-on-reflection* to true.
Change criterium version to 0.3.1.
Update README for 0.2.4.
Update project version to 0.2.4.
Merge branch 'release/0.2.4'