Initial support for Twitter API v1.1 via Net::Twitter::Lite::WithAPIv1_1

- Factored out the API method definitions into Net::Twitter::Lite::API::V1
- Created Net::Twitter::Lite::API::V1_1 with API definitions provided by Marek Foss
  [PR# 6](https://github.com/semifor/net-twitter-lite/pull/6)
- Created Net::Twitter::Lite::WithAPIv1_1 which uses the v1.1 API definitions

V1 tests pass. Needs POD and v1.1 tests.
URI encode content to match Twitter's requirements

See the comments in the code. Twitter is out of complance with the OAuth spec,
here, requiring more stringent URI encodeing of POSTDATA.
Minor formatting change
Added static POD for both v1 and v1.1 APIs