Renamed underscore to lodash where applicable (underscore is still important to know).
Merge pull request #37 from durango/master

Renamed underscore to lodash (where applicable).
use apex domain
Merge branch 'master' of github.com:sequelize/sequelize-doc
don't use net:http
grammar fix
improvements to validation section
Merge pull request #39 from tremby/documentation-patches

Documentation patches
Merge pull request #38 from janmeier/master

Document the possibility of using connection strings
Merge branch 'master' of github.com:sequelize/sequelize-doc
documentation for model validators
model validations: that's not an xor, it's the opposite
update reflecting the validate object structure change
Merge pull request #40 from tremby/model-validation-docs

documentation for model validators
Merge branch 'master' of github.com:sequelize/sequelize-doc