added basic prefix support
basic support for updates
more fluent
removed slash, not necessary
better format of header
added some more curl options
questionmark should be set later
Removed phpunit from dev requirements

It should be installed globally instead.
Replaced run-all-tests script with phpunit.xml
Replaced PSR0 structure with PSR4
Applied php-cs-fixer to enforce PSR2 coding standards
Added coverage report to phpunit config
Updated SolrConnection to use a Guzzle client

Made SolrConnection take the client by injection to simplify testing.

Added Mockery to require-dev for mocking in tests.
Replaced get() with render() for consistency.
Added CircleCI config file

To force testing on latest PHP version.
Merge branch 'release/0.2'