Merge pull request #10 from greenhornet79/master

A couple of small tweaks
Updating IssueM references to point to zeen101
Taggign 1.2.9
Fixing readme and messed up constant variable name
Tagging 1.2.10
Adding missing code to display PDF link in widget when External PDF Link is not empty and set to display PDF links
Tagging 1.2.11