Added ExtractOnly parameter for Extractor Handler
Updated Tests
Updated tests: fixed wrong URL parameters order
Require satooshi/php-coveralls ~0.6 in development
Integrate coveralls with travis-ci
Add coverage badge
Add PHP 5.6 matrix
Require zendframework/zendframework1 ~1.12 in development

Test ZendHttp adapter in CI environment
Install pecl_http 1.7.6 before run scripts in travis
Fix PeclHttpTest
No need to install composer manually
Use phpunit installed by composer
Merge pull request #289 from Gasol/travis-ci

Increase test coverage
Merge branch 'Gasol-coveralls-integration' into develop (PR #290)

Conflicts:
	composer.json
Merge pull request #288 from thePanz/develop

Added ExtractOnly parameter for Extractor Handler
Fixed merge error
Merge branch 'develop' of github.com:basdenooijer/solarium into develop