Ensure target is specified and exists in 1 place instead of many.

Require target to be running for commands that need it.
Closes #239.

usr/local/share/bastille/htop.sh

@@ -42,20 +42,10 @@ help|-h|--help)
     ;;
 esac
 
-if [ $# -gt 1 ] || [ $# -lt 1 ]; then
+if [ $# -ne 0 ]; then
     usage
 fi
 
-TARGET="${1}"
-shift
-
-if [ "${TARGET}" = 'ALL' ]; then
-    JAILS=$(jls name)
-fi
-if [ "${TARGET}" != 'ALL' ]; then
-    JAILS=$(jls name | awk "/^${TARGET}$/")
-fi
-
 for _jail in ${JAILS}; do
     bastille_jail_path=$(jls -j "${_jail}" path)
     if [ ! -x "${bastille_jail_path}/usr/local/bin/htop" ]; then