[backport] Print code coverage ratio in command output

[0xnmad]

Hi,

Don't know if it is possible, but could be handful for CI.

@erichard opened this Issue on 24 Nov 2016 on https://github.com/henrikbjorn/PhpSpecCodeCoverageExtension/issues/60

[ek9]

For this information the text report can be used as it will print report summary in the command line:

Closing.