* copy om1.0 to om1.1 and hide
Also update the front matter a little bit.
* Enable running ABNF check on OM1.1
* enable checking the full example and per metric type
Sync checks with OM2.0.
* fix extra space before value bug in example
Signed-off-by: György Krajcsovits <gyorgy.krajcsovits@grafana.com>