Merge branch 'master' of github.com:DannyBen/php-quandl

Merge pull request #15 from DannyBen/zip

Add support for downloading entire databases (premium)

Merge pull request #14 from DannyBen/endpoints

Add getDatabases and a generic get

Merge pull request #12 from DannyBen/php-vers

Update Travis CI to test against PHP 5.4 - 7.0

add curl download fallback (fixes #2)

Change base list URL to use HTTPS

Remove multiset per Quandls deprecation

Minor readme update

Complete revision of the API

Fixed typo