clean up output

now you can pipe the output directly into other applications. 
`gitio https://github.com/syntax-samurai/gitio -v gitio.sh | xsel -b`

gitio

@@ -31,50 +31,57 @@ usage () {
   -v   shortlink
   -h   display this screen
 EOF
-	exit 0
+  exit 0
 }
 
 err() {
-	echo $1
-	usage	
+  echo $1
+  usage	
 }
 
 optstest() {
-	found=0
-	for arg in "$@"
-	do
-		if echo $arg | cut -d/ -f3 | grep -q "github.com\|raw.githubusercontent.com"
-		then
-			GHURL=$arg
-			found=1
-		elif [ $arg = "-h" ]
-		then
-			usage
-		elif [ $arg = "-v" ]
-		then
-			:
-		else
-			VANITY=$arg
-		fi
-	done
-	if [ $found = 0 ]
-	then
-		err " must be a valid github.com url!"
-	fi
+  found=0
+  for arg in "$@"
+  do
+    if echo $arg | cut -d/ -f3 | grep -q "github.com\|raw.githubusercontent.com"
+    then
+      GHURL=$arg
+      found=1
+    elif [ $arg = "-h" ]
+    then
+      usage
+    elif [ $arg = "-v" ]
+    then
+      :
+    else
+      VANITY=$arg
+    fi
+  done
+  if [ $found = 0 ]
+  then
+    err " must be a valid github.com url!"
+  fi
 }
 
 case $# in
-	1)
-		optstest $1 ;;
-	3)
-		optstest $1 $2 $3 ;;
-	*)
-		err " invalid number of arguments!" ;;
+  1)
+    optstest $1 ;;
+  3)
+    optstest $1 $2 $3 ;;
+  *)
+    err " invalid number of arguments!" ;;
 esac
 
 if [ -z "$VANITY" ]
 then
-	curl -i http://git.io -F "url=$GHURL"
+  url=`curl -is http://git.io -F "url=$GHURL" | grep -i "location" | cut -d' ' -f2`
 else
-	curl -i http://git.io -F "url=$GHURL" -F "code=$VANITY"
+  url=`curl -is http://git.io -F "url=$GHURL" -F "code=$VANITY" | grep -i "location" | cut -d' ' -f2`
+fi
+
+if [ -z $url ]
+then
+  err " must be a valid github.com url!"
+else
+  echo $url
 fi