Merge pull request #10 from niaeashes/gem/for_tests

add guard-rails and factory_girl_rails into Gemfile
Merge pull request #11 from niaeashes/gem/guard-rspec

add guard-rspec into Gemfile, and run guard init
Merge pull request #12 from niaeashes/feature/estimates

Feature/estimates
Merge remote-tracking branch 'origin/master' into feature/estimates