add model 'AchievementListing'
switch from 'AchievementListing' to 'Achievement'

Each Achievement is a dedicated record
Add 'Achievements' route, template, linkTo (in nav bar)
'achieved'->'is_achieved', listing in template
add function & action 'toggleAchieved'
pull changes related to 'Achievements' in test.index.html
add empty FIXTURE for App.Achievement
add comment 'Master of the App'
'Achievement.description' becomes 'Achievement.how_to'
supress comments
add observers for 6 automated achievements

observer for creation & deletion of Contact & Group
observer for 'about' & 'achievement' page
try using arrayWillChange