Changed all Private visibility to Protected
Protected variables and function names should have a single preceding underscore
Merge pull request #51 from angelxmoreno/2.3-fix_Private_Visibility

Changed all Private visibility to Protected
Merge remote-tracking branch 'origin/2.3' into 2.3-fix_AssociateTag_typo

Conflicts:
	Model/Datasource/AmazonAssociatesSource.php