Merge branch 'release/0.2.7' into develop
lein-release plugin: bumped version from 0.2.7 to 0.2.8-SNAPSHOT for next development cycle
Allow list-groups in panels, make panel-body optional
Merge pull request #22 from brutasse/feature/panel-list-group

Allow list-groups in panels, make panel-body optional
update changelog
lein-release plugin: preparing 0.2.8 release
Merge branch 'release/0.2.8'