add mongo mapper gem
remove activerecord dependencies
remove unused files, packages and gems
delete all capybara features tests
adjust .travis config for mongodb
refactoring user_spec tests
refactoring user_session_spec tests
extract service class to deal with authentication
cover basic project embedded document specs
cover sprint doc specs
extract project from user and make it a collection
refactoring models specs
unable to execute mongodb query in project#task_search
project#task_search is failling
refactory project collection documents structure
make sprint embedded a collection
make task embedded a collection
NOTE this refactoring was introcuced by the hardness of nested documents query in mongo-ruby-driver
fix broken spec tests from controllers and models
remove user#projects association, now its project#users
fix oauth authentication bugs
refactory all js code, but stil lot to do
NOTE still theres lots of bugs in front-end crud operations
README update