GPif

I tested and had this exception : ``` NameError: uninitialized constant Arel::Visitors::BindVisitor from /Users/gg/.rvm/gems/ruby-2.3.1/bundler/gems/odbc_adapter-89b91d009e91/lib/odbc_adapter/adapters/null_odbc_adapter.rb:8:in `' ``` I did a diffrent modification [here](https://github.com/GPif/odbc_adapter)