Completed a TO DO action in AzureHelper.cs

Now, when you invoke the static method GetCertificate, its sets the
value of the static property Certificate. So this way, you don't need to
send the certificate around all methods.
Removed userprefs from tracking
Added .userprefs extension to .gitignore
Missed an asterisk XD
Merge remote-tracking branch 'Leon-O/master'

Conflicts:
	Azureoid/Azureoid.userprefs
re #8
Adding new folder structure