simpler method of checking markdown.php loaded
pass $type by injecting via constructor
added test for checking API and creating new instance of API class object

passing the $type to determine which API to use and create new instance of that class object in $repo_api. $repo_api is then used to call appropriate methods.
CHANGES updates
added default empty array to tags value
update README for filter hook not working
redesign filter hook for transient updates - though still not working :-P
fixed branch and download link setting when API not responding
CHANGES updates
version bump
Merge branch 'refs/heads/develop'