Improved verbosity of test() in tests.Rraw.  Added usage comments to the top.  This is for CRAN maintainers (as requested) when they are tracking down knock on effects to packages of changes made in R-devel.
Improved verbosity of test() in tests.Rraw.  Added usage comments to the top.  This is for CRAN maintainers (as requested) when they are tracking down knock on effects to packages of changes made in R-devel.

vlulla/data.table,Rdatatable/data.table,Rdatatable/data.table,jangorecki/data.table,Rdatatable/data.table,vlulla/data.table,jangorecki/data.table,jangorecki/data.table,vlulla/data.table,vlulla/data.table,Rdatatable/data.table,jangorecki/data.table