- renamed log variable to log_file to make moria::common::runtime
  compatible with tkj, among other scripts.
- much improved xsd2rnc converter

- now creates Emacs/nxml mode schema snippets, or indeed  a complete
  schema.xml

- hardening

- support for passing multiple XSD files.

- consolidated common/io/runtime.sh and common/indispensible. Only
  indispensable is indispensable.

- more hardening