An argument is mandatory for the `code-block` directives.

[WebUI] when alert is ongoing hide level

Close #694.

- use shields.io badges
- update Windows instruction

In short, this is unicode in Python 2 and str in Python 3.

[WebUI] Fix auto unit helper

...otherwise the file handle is left open due to the use of return
before the handle closure.

OK FreeBSD, OS X and Windows.

OK FreeBSD, OS X and Windows.

OK FreeBSD, OS X and Windows.

This reverts commit 79dc79f9.

See PR #683.

Changed percentage bars to use an explicit assertion error if valid is outside of the expected range.

Correct an issue while exiting Docker sub process on Python 3.4. Correct it for both Python 2 and 3 thnaks to http://stackoverflow.com/questions/27102881/python-threading-self-stop-event-object-is-not-callable