delete unused variable (refs #4285)
add control of visibility to download file (refs #4286)
add http status code 404/403 when cannot download file
add cvIdview argument in getFileLink for cv views (refs #4286)
use actionUsage (refs #4286)
Merge pull request #1015 from Eric-Brison/3.2-I4286

add more controls on export files (closes #4286, closes #4285)