this version only works with 4.3 (some dao file names have changed in 4.4)

info.xml

 <?xml version="1.0" encoding="utf-8"?>
 <extension key="org.civicrm.module.cividiscount" type="module">
 <downloadUrl>
-https://github.com/dlobo/org.civicrm.module.cividiscount/zipball/v2.2
+https://github.com/dlobo/org.civicrm.module.cividiscount/zipball/v2.3
 </downloadUrl>
 <file>cividiscount</file>
 <name>CiviDiscount Module Extension</name>