Merge pull request ipinfo#37 from ipinfo/uman/better-batch-ops

Improved batch processing

skip batch tests without token.

the token is required to make batch reqs

Major bump - DefaultCache's constructor interface was changed a bit

Merge pull request ipinfo#13 from ipinfo/uman/fix-deps

Fix missing `six` dependency

Merge pull request ipinfo#11 from ipinfo/uman/index-error-fix

Bug fix to bad coordinate reading on private IPs.

Add support for Python 2. Add default timeout.

Initial version.