Replace %I [01, 12] with %H [0, 23]
Merge pull request #1284 from benallard/patch-1

Use 24 hour clock by default in www plugin (GH-1284)
Make url to d3.min.js relative.

This allow us to mis-configure www['url'], and still have it working. Beside, we don't need to access it absolutely actually.
Fix documentation:
 - cmd is not a valid arg for util.ShellArg
 - array-ish version of the commands
Merge pull request #1286 from benallard/patch-3

Make url to d3.min.js relative.
Merge pull request #1287 from delanne/DocFixShellSequence

Fix documentation: Shell Sequence
Bug 2965: enable Coveralls