create model and controller to backers
create new backer method and view with basic style
create column pledge_id in backers model
add relations between project, pledges and backers
Added new backer view
deleted method project_status from projects_helper
added method create and backers_params in backers controllers
added validations to backers model
added project_id and user_id to validations
create method validate to backers angular controller
deleted backers.js
clean view new backer
validate pledge and amount in new backer
message when the pledge is no aviable added
validations colors code added in new backer view
refactored code in backersController
refactored method noreward and validate in backersController
test
Merge pull request #18 from tangosource/feature/back-to-projects

Feature/back to projects