Add editor window repo save functionality

[wiredwiz]

Add new configuration values to an individual world definition to help drive local versioning control.

1. A field "World Code Repo Path"
2. A field "Halt Upload On Write Failure" (default value TRUE)

If the repo path is specified, then any local code edit window should attempt to save the current code window to a file within that repo path under the name "-" (the verb name will need to be sanitized for some). If the save fails and the "Halt Upload On Write Failure" is set, then stop and display an error message to the user. This will allow users to keep local versioning repos containing their code changes.