add new scope methods
update exclude scope
change lambdas to new style
add blank lines between scopes (more readable)
fix self
add quotable of values
revrite to arel_table using
Update with and without
save
start testing gem
two gem for tests
update gitignore
Update tests
Travis badge
update test
Update README.md
Merge branch 'testing' into feature/arel_table_with_tests

* testing:
  update test
  Travis badge
  Update tests
  update gitignore
  two gem for tests
  start testing gem
Fix test
Without tests and refactoring
Merge branch 'testing' into feature/arel_table_with_tests

* testing:
  Without tests and refactoring
  Update README.md