add rewards model
add admin model
add reward_image model
add carrierwave and seed some default rewards and images
Add rewards controller and some templates
add some logic for reward selection
some useability and structure changes"
add angular file upload module
add reward_images controller
add some css
check assessments bug
add ability to update/delete rewards"
add ability to destroy custom images
cover rewards_controller
write specs for reward images"
specs for coaches/rewards
Merge pull request #13 from Minisai/R-22_Rewards_page

R-22: rewards page