ACCUMULO-1960 Fall back onto sudo if the user doesn't run it as root and isn't running processes as their user for agitation.
ACCUMULO-1960 Use $ACCUMULO_CONF_DIR/gc to kill the gc, not $ACCUMULO_CONF_DIR/masters
ACCUMULO-1960 Update README for continuous ingest for agitator improvements.
Merge branch '1.5.1-SNAPSHOT' into 1.6.0-SNAPSHOT