change R_HOME to point to /app/vendor/R/lib64/R
Merge pull request #32 from craigschmidt/master

change R_HOME to point to /app/vendor/R/lib64/R
apply bug fix from gsl branch from @NebJ
ensure target directories exist
pathing fix
sync'd improvements from development branch
Merge branch 'master' into development

* master:
  sync'd improvements from development branch
  pathing fix
  ensure target directories exist
  apply bug fix from gsl branch from @NebJ
  change R_HOME to point to /app/vendor/R/lib64/R

Conflicts:
	support/build-r
	support/heroku-build