Can now specify a URL instead of uploading a DMG.

The DMG will be downloaded by the server and processed as if it had been uploaded.
Handle HTTP redirects and HTTP errors in URL upload from f76d25e.
URL upload now also accepts local file system paths instead of URLs
Merge pull request #170 from mkuron/urlupload

Can now specify a URL instead of uploading a DMG.
Refactor add package via URL functionality, add further error checking
Use redirected URL to name file
Update unit.rb

Fix bug where users who can read via group permissions were not being added to the list of users returned by unit.users_who_can_read()
Merge pull request #177 from ih84ds/master

Typo fix
Fixed an issue where app icons weren't being retrieved
Merge pull request #179 from Ginja/master

Application Icons
Changing all references to http://www.macupdate.com to the https:// version
Escaping URIs so that they can parse URLs with spaces
Update and rename README to README.md

Adding a bit of information to the README, changing to README.md, and stole a bit of info from a @ginja blogpost (http://rileyshott.wordpress.com/2013/03/24/mac-munkiserver-puppet-module/)
Merge pull request #181 from jnraine/fix_macupdate_parse

Fix macupdate parse. Thanks @mkuron for the vote of confidence!
Update README.md
Updated rails to 3.2.12
Removed newrelic gem as it appears to require a license
Updated OS version array to include 10.8.4
Fixed warranties not being shown properly due to Apple changing their warranty URL.
The following fields were removed:
*Product Description (Didn't find anything useful to scrape for this)
*Purchase Date (Purchase date is no longer displayed on warranty page)
*Forum URL (Forum URL is no longer displayed on warranty page)
Merge branch 'master' of github.com:Ginja/munkiserver into Ginja-master
Ignore munki_scripts builds