Stricter semver range for eslint
Stricter semver range for eslint

eslint tests started to fail all of a sudden without any changes to the
code, so for now we're enforcing 1.4.x, since it seems eslint 1.5.0
introduced some breaking changes for us.

cgiffard/node-simplecrawler,simplecrawler/simplecrawler,simplecrawler/simplecrawler,civalin/node-simplecrawler