Revert "use vim on Mac"

This reverts commit c0eea0144c4e80f8be44ecc0932dadc1947a8cab.
add checkstyle-basic.xml

Change-Id: Ie2ec8685a4df39971644092b8b6a48323d507da4
update checkstyle.xml

Change-Id: I02693c1404f99f1a30139da900624282ffa37097