adds new rcloud.{disable,enable}.warnings functions. Closes #320.
Merge branch 'enhancement-320' into develop
x !== NaN doesn't do what it looks like it does
adds a button to export notebook as r source. Closes #314
Merge branch 'enhancement-export-as-r-source' into develop
news.md
adds rcloud.disable.echo and rcloud.enable.echo. closes #216
add save on unload. closes #239
Merge branch 'enhancement-239' into develop:
merge