yaml 1.2 not supported by R package yaml

[sje30]

hi @nuest

I needed to delete

%YAML 1.2
---

as the R package yaml doesn't handle version 1.2 of yaml -- see
vubiostat/r-yaml#76

[arthurldp]

Up

It would simplify any automated workflow if YAML header (%YAML 1.2) could be read (or even just ignored) by read_yaml()
Like a for read.csv(file,skip=2)