[FEATURE] Add average calculation method
Based on Dirichlet prior probability distribution
Sponsored by: CentronetMarketing, MovingDirectory
Fixed broken acossiations in Rails 4.
Merge pull request #50 from murrekatt/master

Fixed broken acossications in Rails 4.
Merge pull request #40 from CentroNet-Marketing/dirichlet-avg

[FEATURE] Add average calculation method
rails 4 implementation
coffee script name is changed
letsrate.js.erb is changed
generator is changed
readme
1.0.9
jruby is removed
allow reupdating of rating
added ip to rate for applying rating for not logged in users
added dependent destroy to rater