Versioning does not require the Git path anymore. CONFIG UPDATE REQUIRED.

Instead of executing a potentially insecure command, we are now reading the version checksum directly from the master HEAD in the git directory (if it exists).

This means that the `GIT_PATH` variable **MUST BE REMOVED** from your configuration, otherwise a fatal error will happen.

Finally, the default skeleton config has been updated and revised. It is now wrapped in 80 columns, and the comments are better.