Removing the GPL licenese.
Adding the MIT license.
Updating composer.json with the new license, highlighting other contributors.
Merge pull request #30 from tableau-mkt/mit

Elomentary is now MIT-licensed.
Fixed Custom Object Data markdown header
Using AbstractApi::validateExists() instead of isset() in CustomObject.php
Newline at end of file CustomObjectTest
Merge pull request #31 from NTPX/CustomObjects

Adding support for custom object data and metadata.
Adding link to contact field docs in. [ci skip]
.gitignore for phpstorm files
Merge branch 'master' of https://github.com/tableau-mkt/elomentary
Merge branch 'master' into BulkApi