Implement all of V3 Google Drive API

[xsawyerx]

This is quite a big PR and might require additional conversation.

What is essentially done here is:

• Simple.pm was split to Simple/V2.pm and Core.pm.
• Core.pm is a baseclass that Simple/V2.pm uses - all general methods moved there.
• Simple/V3.pm is now introduced. It supports all the methods in V3. It uses some of what already exists and reinvents some.
• There are tests for all internal methods.
• All documentation is updated.

A few things to keep in mind:

• There aren't any live tests in this PR. I started writing them but didn't include them.
• The get_* methods might be better named as *. For example, get_permission() might be better as permission() - this is a bit tricky when some of them are verbs like reply() or comment().
• Some other convenient methods (like moving, renaming, downloading, etc.) are not available yet even though everything in the Google Drive API is provided.
• There is no easy transition from V2 to V3.
• I dislike the use of the Item.pm class which utilizes AUTOLOAD.

[xsawyerx]

Adding another item: All warns and dies should go to Log4perl. I can fix that before it's merged.

[atoomic]

As discussed some minor fixup and improvements before we can merge this work Thanks a lot for providing support for v3

[xsawyerx]

Updates:

• Everything uses Log4perl now
• All methods parameters are checked. Where all parameters are optional, the method doesn't require you to provide parameters.
• HTTP methods and Google API types were moved to constants to fix and avoid typos.
• Corrections: method names, types, documentation types, body parameter struct mistakes, etc.
• Remove pattern of assigning to variable and returning variable.
• Parameter check callbacks moved from arrayref of sub + error to sub that returns the error.
• auto_paging option in helper method now documented.
• We make sure q parameter is both define and has length.
• Removed unused is_folder method.