Changes:

- Fixed username in GetFullRepository()
- Included new GetReadmeAuto() to enhance the chance of finding the readme file and content
- Changed the standard GetReadMeUrl()

Changes:

- Reverted namespace changes, only 'GithubNet' now
- Added project url, readme url etc.
- Added custom toString to all types

Reworked everything, new methods, new types, new structure and new RE…

…ADME..

Changes:

- Introduced GetRepositoryInfoAsync() to retrieve informations about a specific GitHub repository
- Added a repository-class for the GetRepositoryInfoAsync() method
- Moved models in a dedicated "Models" folder
- Changed data types for TotalStars and TotalForks from string to integer

Add project files.