:bug: fixed token authentication
allow user to provide auth.type='token' and correctly encode the token for authroization header
Add get-issue-labels route

This route gets the labels for an issue specified by issueNumber.
Allow "per_page" and "page" params on search.users, search.issues and search.repos.
Merge pull request #186 from stanleyhlng/search-paginations

Allow "per_page" and "page" params on search.[users|issues|repos]
Merge pull request #185 from iFixit/master

Add get-issue-labels route
Merge pull request #174 from groupsky/support_token_authentication

fixed token authentication
added missing docs, auto-generated.
bump version to v0.2.2