Google-api-support

This release fixes a bug on the drive.py file.

Images were not uploaded because there was an incorrect `not` in a conditional clause.

Issues opened and closed are the following:

https://github.com/vperezb/google-api-support/issues/40, by ejh56

Many thanks !

Modified setup.py, some libs were not found

Oauth method now can be used

To be used you only need to set the GOOGLE_OAUTH_CREDENTIALS with the path of the OAuth file.

Thanks to ejh56 for adding this feature!

As reflected in issue https://github.com/vperezb/google-api-support/pull/29, new functions have been added to deal with shared permissions.

Many thanks to silvia-ventoruzzo for the new functionality!

More details on this update are below:

new function retrieve_permissions to extract permissions of a file (taken from [DriveAPI](https://developers.google.com/drive/api/v2/reference/permissions/list) )
New function insert_permission to insert new permission into a file (rework of the V2 version shown [here](https://developers.google.com/drive/api/v2/reference/permissions/insert)
new function copy_permissions which is a combination of the two previous functions and takes the permissions of one file and puts them into another (unless transfer ownership is not allowed, in which case the owner because a writer)
added the argument transfer_permissions into the function copy_file which uses the latter function to transfer permissions to the file copy
created an example notebook to show how this argument changes the result