Changed

• Don't expand ${HOME} in the init.zsh script. (See #509)
• Don't allow calling zmodule from the command line. Let it fail with "command not found" instead, as it's intended to be used only in the .zimrc script.
• ZIM_HOME must be defined before sourcing zimfw.zsh. All documentation was already doing so, hence not considering this as a breaking change.
• Allow zimfw.zsh to exist anywhere else, not only inside ZIM_HOME. This enables installing the zimfw.zsh script independently with a package manager.
• Don't try to upgrade if sourced zimfw.zsh is not in a writable path.
• Don't try actions that write to ZIM_HOME if user has no write permissions there.

Fixed

• Update error messages to hopefully make it clearer when either the git or the degit tool is being used.
• Set read permissions to generated init.zsh script, so it can be read from other users.