Small changes in code style
A bit of code modernization
added a token type to satisfy section 6.3.1 of OAuth 1.0a spec
Merge pull request #17 from smazurov/upstream

added a token type to satisfy section 6.3.1 of OAuth 1.0a spec
fixed a bug that would incorrectly decode strings with %2B (+) hex characters to have a space
Merge pull request #18 from smazurov/upstream

fixed a bug that would incorrectly decode strings with %2B (+)
Only add POST body if content-type is x-www-form-urlencoded

Fixes Issue #19
Updated the Twitter demo to use the API v1.1