Added better reporting for mk_link.

lib/helper/mk_link

@@ -5,12 +5,23 @@ REPORT="`dirname $0`/report"
 
 if [ -z "$1" ] || [ -z "$2" ] ; then
   "$REPORT" error "ERROR: Both to and from string must be defined.\n     source: $1 \n     symlnk: $2"
-  exit
+  exit -1
+fi
+
+if [[ -h $2 ]] ; then
+ link_location=$(readlink $2)
+  if [[ "$1" == "$link_location" ]] ; then
+    "$REPORT" info "symlink already installed $1"
+    exit 0
+  else
+    "$REPORT" warn "symlink already exist, buut doesn't point to the src"
+    exit 1
+  fi
 fi
 
 if [[ -e $2 ]] ; then
-  "$REPORT" info "$2 already exist. Skipping."
-  exit
+  "$REPORT" warn "Something already exists at $2."
+  exit 1
 fi
 
 parent=$(dirname "$2")