Update README.md
Merge pull request #82 from alejandro/master

Added nodejitsu support and custom deployment from Travis
Adding simple entries for any creation/modification (including archive/unarchive) that includes userId, action, time, and (for mods) the change set. This is one in the database module, so history is logged on all db documents globally.
Merge pull request #85 from AcklenAvenue/78-document-history-back-end

Adding simple entries for any creation/modification (including archive/u...
Adding validator types
Added user-defined validation to front end (#70).
Merge pull request #86 from AcklenAvenue/70-user-defined-validation-in-collections

70 user defined validation in collections
Fixed one test that was failing intermittently.
Merge branch 'master' of github.com:AcklenAvenue/DatosAbiertos
Fixes #87
Added validators. (#72)
Added pre-validation for new docs and modifications (#72).
Added prevalidation endpoints to api. Closes #72.
Finished admin data entry validation.
Fixes #73
[wip] Changelog:

- modules/database.js {CollectionWithPromises} -> modules/database-collections.js
- currentConenction is now a getter, makes more sense
- To look further database timeouts giving warning on tests run