Fix for “Cannot use isset() on the result of a function call”
Defined data variable not added to insert
Fixed #4

Not really a DRY solution
Optimized upload json-response. Added publish date, and nested all info.
approval_prompt

The approval_prompt was already in the config, but not added to the
Youtube _constructor.
Merge pull request #3 from Jaspur/master

Fix for “Cannot use isset() on the result of a function call”