created a model for presence validation rules
Display raw list of defined validation rules in the interface
implemented inclusion validation rules
added numericality anf format validations
added views for single column inclusion validatins
fixed failing inclusion validation spec
remove the limit on number of returned validations
added format RE to json output
fix for materialized view dependencies
Merge pull request #41 from unepwcmc/validation_rules

Validation rules
Merge branch 'master' into sandbox_validation