Added application name and version to Google client initialization
Merge pull request #336 from lazyguru/add-application-info-to-google-client

Google client complains about missing application name and version not being supplied
Bugfixes in twitterlogger:

- Fix incorrect test for undefined digest_timeline option
- Fix test for empty image array in single_entry function
Merge pull request #338 from randomphrase/master

Bugfixes in twitterlogger