Initialise an empty [[WikiFolder|WikiFolders]] with a copy of the specified edition.
```
--init <edition> [<edition> ...]
```
For example:
```
tiddlywiki ./MyWikiFolder --init empty
```
Note:
* The wiki folder directory will be created if necessary
* The "edition" defaults to ''empty''
* The init command will fail if the wiki folder is not empty
* The init command removes any `includeWikis` definitions in the edition's `tiddlywiki.info` file
* When multiple editions are specified, editions initialised later will overwrite any files shared with earlier editions (so, the final `tiddlywiki.info` file will be copied from the last edition)
