oauth2client 4.0.x compatibility, squash of keliomer's PR, merges goo…

…glearchive#79.

Update to version 1.3.0, updates to BOM handling, Encoding specificat…

…ion, Documentation (including new examples folder), and .gitignore.

Add BOM removal ability, update .gitignore.

BOM removal implemented, new test passing.

Added internal flag, fixed test.

Implemented RemovePrefix, tests added and passing.

BOM {insert | remove} tests now passing.

Refactor of RemoveBOM for readability.

Integration tests now passing.

Documentation updated, example added, .gitignore updated.

Added TODO file.

Add optional parameter to {Get|Set}ContentString to choose encoding, resolves googlearchive#74, add example of folder use, resolves googlearchive#72.

Correct the quickstart documentation.

Add CONTRIBUTING.

Update CommandLineAuth documentation.

Bump the version.

Update documentation, and remove superfluous make files.

Updates for new PyPI release.

Initial Import