adding readme

Readme.markdown

@@ -0,0 +1,26 @@
+# Introduction
+
+This is bash script to install ImageMagick on Snow Leopard.
+
+## Configuration
+
+Please have a look at install_im.sh to customize your environment.
+
+## Execution
+
+You can run the script as a normal user, it does use sudo at a certain point, so be sure to not leave the installation unattended.
+Depending on many factors the sudo command may expire during the execution of the script, so if it asks you again the password don't worry, it's normal.
+
+Alternatively you can run the script as root.
+
+    chmod +x install_im.sh
+    sh install_im.sh
+
+## Contribute
+
+If you find that the script uses an outdated version of the requirements or ImageMagick, please modify the script accordingly, test if it can still produce a valid ImageMagick installation and notify me about the changes, thanks.
+
+## Resources
+
+* [iCoreTech Research Labs](http://www.icoretech.org)
+* [Github Repository](http://github.com/masterkain/ImageMagick-sl)

install_im.sh

@@ -18,16 +18,15 @@ function try_download () {
   curl --fail --silent -O --url $1
   result=$? # Store the code of the last action, should be 0 for a successfull download.
   file_size=`ls -l "$file_name" | awk '{print $5}'`
-  # We check for normal http errors, otherwise check the file size
-  # since some websites, like sourceforge, redirects and curl can't
+  # We check for normal errors, otherwise check the file size.
+  # Some websites like sourceforge redirects and curl can't
   # detect the problem.
   if [[ $result -ne 0 || $file_size -lt 500000 ]] # less than 500K
   then
     echo "Failed download: $1, size: "$file_size"B, aborting." >&2 # output on stderr.
     exit 65
   else
-    # add the filename to an array to be decompressed later.
-    apps=( "${apps[@]}" "$file_name" )
+    apps=( "${apps[@]}" "$file_name" ) # add the filename to an array to be decompressed later.
   fi
 }