added to check if cowsay exists, also readme

README.md

@@ -1,5 +1,9 @@
 ponysay - A cowsay wrapper with ponies.
-These are desktop ponies converted using https://github.com/ducttape/ducttape-editor/wiki
+The original author of the cowfiles is unknown.
+(But we are told that the artist is known as "Rossy". If you are the artist, we'd appreciate if you contact us before you sue us.)
+
+These are desktop ponies converted using [ducttape](https://github.com/ducttape/ducttape-editor/wiki)
+
 ![Derp](http://i.imgur.com/xOJbE.png)
 
 [](/derp "Today your terminal, tomorrow the world!")

ponysay

@@ -1,11 +1,20 @@
 #!/usr/bin/env bash
 
-version=0.4
+version=0.5
 SYSTEMPONIES=/usr/share/ponies
 HOMEPONIES="${HOME}/.ponies"
 pony="*"
 wrap=
 
+if [[ -f `which cowsay` ]]; 
+then continue;
+else
+    echo "You don't seem to have the cowsay program."
+    echo "Please install it in order to use this wrapper."
+    echo -n "(Or symlink it to 'cowsay' in anywhere in \$path "
+    echo "if it actually exists under a different filename."
+fi
+
 cmd=cowsay
 [[ ${0} == *ponythink ]] && cmd=cowthink
 
@@ -15,8 +24,7 @@ version() {
 
 usage() {
     version
-    echo
+    echo -e  "\nUsage:"
-    echo "Usage:"
     echo "${0##*/} [options] [message]"
     echo
     echo "If [message] is not provided, reads the message from STDIN"