* - Replace apache oltu with scribejava
- Implement the following authentication methods
- ApiKey header
- HTTP basic authentication
- Oauth client credentials flow
- Oauth Implicit flow
- Oauth Pasword (deprecated)
* Create class hierarchy for Oauth flows implementation
* Add instructions of how to use the ApiClient to Readme.md
* Update samples
* Remove support for java 6 and 7
* Remove java 6 and 7 support from gradle
* Format pom.xml
* Remove empty line
* Update samples
* Remove oltu dependency from build.gradle and build.sbt.
Replace oltu with ScribeJava
Update samples
* Update samples
* Update samples