add user & contribute model
add use gem
add more ttributes to users
comment out attr_accessible
add user fetch method
Merge pull request #14 from RyanZhu1024/master

user view added
merge conflict and added pry configuration
Merge pull request #17 from yankforce/master

merge and commit for contribute
Fixed #16
update ignore
fixed some left merge problem
Merge pull request #19 from yankforce/master

continue merge and make it works