.aliases: Add mergepdf alias that concatenates PDF files

Credit goes to Fritz Stelluto: http://blog.gotofritz.net/howto/joining-pdf-files-in-os-x-from-the-command-line/.

.aliases

@@ -95,6 +95,10 @@ alias showdesktop="defaults write com.apple.finder CreateDesktop -bool true && k
 # URL-encode strings
 alias urlencode='python -c "import sys, urllib as ul; print ul.quote_plus(sys.argv[1]);"'
 
+# Merge PDF files
+# Usage: `mergepdf -o output.pdf input{1,2,3}.pdf`
+alias mergepdf='/System/Library/Automator/Combine\ PDF\ Pages.action/Contents/Resources/join.py'
+
 # Disable Spotlight
 alias spotoff="sudo mdutil -a -i off"
 # Enable Spotlight