look in right place for components

modified:   R/vdswim_impute.R
Merge branch 'master' of https://github.com/jmarca/calvad_impute_trucks
I really want task.opts, not task.env

even though I had a test, it wasn't really working correctly!

the hint was that a dummy version looking for test/test.R was working
right, even though it should have failed because I *thought* I was
saying the working dir for R was R (which should have meant the path to
test/test.R was not a file).

modified, tested by running it, works okay.
ignore components from repo