add yamlWriter
integrate yamlWriter
a few more tweaks
adjust options strategy
got testit working
add from and to feature for testit
change defaults for from and to arguments
small tweaks to prep for merge
prep for merge with version increment and add a NEWS file
update README and make hlp() prettier
add yaml to imports, add count_units(), update docs
remove travis until package stablizes
Merge pull request #7 from swirldev/yamlWriter2

Add yaml_writer.R to accommodate a simpler authoring workflow