Update appveyor.yml
Update appveyor.yml

Windows r-devel on Appveyor back on.
jangorecki/data.table,vlulla/data.table,Rdatatable/data.table,vlulla/data.table,Rdatatable/data.table,jangorecki/data.table,Rdatatable/data.table,jangorecki/data.table,vlulla/data.table,Rdatatable/data.table,vlulla/data.table,jangorecki/data.table