add simple markup version of the README (and trigger the CI again)

12 jobs for cdi-1.8.x-pio-merge in 0 seconds
latest
Status Job ID Name Coverage
  External
passed buildbot/test.all.gcc-6.4.0

passed buildbot/test.all.intel-17.0.6

passed buildbot/test.all.nag-6.2.6223

passed buildbot/test.all.pgi-19.9.0

passed buildbot/test.icon.gcc-6.4.0

passed buildbot/test.icon-pio.nag-6.2.6223

passed buildbot/test.all.gcc-6.4.0

00:04:07

passed buildbot/test.all.intel-17.0.6

00:06:03

passed buildbot/test.all.nag-6.2.6223

00:03:06

passed buildbot/test.all.pgi-19.9.0

00:05:07

passed buildbot/test.icon.gcc-6.4.0

00:01:31

passed buildbot/test.icon-pio.nag-6.2.6223

00:02:33