Added autoload dev for tests (kriswallsmith#253)

* Added autoload dev for tests

* Do not use phpunit-bridge

* Run tests with php 6.3 on php7

Merge pull request kriswallsmith#242 from Nyholm/changelog

Added Changelog for 0.15.2

Prepare for 0.15.1 (kriswallsmith#230)

* Prepare for 0.15.1

* Updated changelog

updated changelog

added changelog

Merge pull request kriswallsmith#170 from CEikermann/request-exception

RequestException extends ClientException

added missing annotations (fixes kriswallsmith#139)

Merge pull request kriswallsmith#136 from Koc/file-upload

Fix file uploading compatibility via curl for 5.5

Merge pull request kriswallsmith#125 from JasWSInc/master

cURL Compatibility Improvement

Merge pull request kriswallsmith#107 from stloyd/feature/cleanup

Add missing exception change to MultiCurl. Polished phpdoc in FileGetCon...