A useful function in ProcessorUtils is subprocess_and_log, which builds a subprocess command and write its stdout and stderr to the log handler. Beforehand, failures only ever generated an error message, but there are some use cases where another log type is preferred. This adds a log type option to the function, and uses it in one case where a warning is more appropriate.

Initial commit. Currently only working for Nepal deposition and (partially for) Ethiopia environment v2.0