Minor updates and bug fixes

v1.2.3 - 2015-03-12

• Achievement design and functionality updates
• Achievement shortcode added
• Better searching added to engagement screen
• Achievement bug fixes
• On screen error reporting added to activation for trouble shooting
• Custom engagement methods added to certificate, achievement and sections
• Corrected new user registration engagement bug
• LifterLMS access reduced from manage_options to edit_posts
• Filters added to analytics to allow custom development
• Engagement bug fix: Section and Lesson bug select
• Syllabus bug corrected: No longer displays lessons in section box if no sections exist.
• Removed depreciated achievement template
• Membership Bug fix: Membership restriction will now only display on single posts.