Fixes issue #17 - NoMethodError: undefined method `sanitize_limit' for #<Object:...>

[t-anjan]

When trying to access a table-less model through an association, it was throwing a 'NoMethodError: undefined method `sanitize_limit' for #Object:...".

Fixed the error by defining that method on the "connection" variable. Took the method from the ActiveRecord gem: /lib/active_record/connection_adapters/abstract/database_statements.rb .

[pboling]

@softace bump