e114b3dba2
This change has two implications: 1) tree_render() will now be called precisely once for input which consists of multiple commands (like "focus left; focus right"). Also, the caller of parse_command() has to call it. This makes us able to fix tickets such as ticket #608 (where multiple tree_render() calls are noticable). 2) The output of a command is now a JSON array of return values of the individual subcommands. In the case of "focus left; focus right", this is: [{"success":true}, {"success":true}] While this is incompatible with what i3 returned before, the return value of commands was undocumented and therefore not subject to our API stability.
