Deprecate backbone.validation package on NPM in favor of backbone-validation

[justinffs]

Just ran into the issue where an old tutorial was used and someone ran npm install backbone.validation instead of backbone-validation

NPM docs have some instructions for deprecating a package

https://docs.npmjs.com/cli/deprecate

npm deprecate backbone.validation@"< 0.7.2" "WARNING: This project has been renamed to backbone-validation. Install using backbone-validation instead."

[rally25rs]

backbone.validation was published by someone who forked this lib and published it under that different name https://github.com/blikblum/backbone.validation so there is nothing that @thedersen can do about that.