ec-3.1.0

• New: experimental support for Windows (known limitations listed in
  Troubleshooting_windows).
• New: library with shell commands abstraction - qsl/os
• New: tutorial -
  Lesson 5 - Authentication and authorization
• Fix: monitor - [sysHdbSummary] and [sysDiskUsage] configuration handling (#8 and #9)
• Fix: (Windows) remove administrator privileges requirement for standard library - qsl/sl