Revert "Remove command block until #136 is fixed"

This reverts commit 3f76b77001512a7b71a8c81c181f78729c34e0d0.
Fix #136 by always running commands as the placer
Use a textarea for the commandblock to accept multiple commands
Merge pull request #141 from ShadowNinja/commandblock_textarea

Use a textarea for the commandblock to accept multiple commands