Merge branch 'hotfix/v0.8.10'
Merge branch 'release/v0.9.0'
Allow players to retrieve items from sell shops, fixes #247
Fix adding and removing temporary stat modifications, closes #248
[maven-release-plugin] prepare release v0.9.1
[maven-release-plugin] prepare for next development iteration
Merge branch 'hotfix/v0.9.1' into develop