Added test for group with vis level

Added namespace search endpoint. Fixes GitLabPHP#101

Added current_sign_in_at field to User modal

Handle dots and slashes when encoding. Fixes GitLabPHP#86 GitLabPHP#87

- Support authentication via OAuth

- Expose avatar_url in Project Model
- Refactor of project hook endpoints (breaking change)

Project sorting tests and saving group member test

Merge pull request GitLabPHP#47 from davidkuridza/bug/fix-wrong-MR-co…

…mments-endpoint

fix wrong comments endpoint for merge requests

Merge pull request GitLabPHP#45 from iamluc/master

Get file API

Added pagination support to Users::all(). Fixes GitLabPHP#24.

Merge pull request GitLabPHP#19 from ivankristianto/master

add project search function