Capability to ignore custom annotations

#11, #10 - capability to ignore custom annotations (fixed adapter crash when running PHPUnit tests with annotations like @Depends, @ExpectedException and so on)

Test case and exception handling

add - All Exceptions coming from PHPUnit are now correctly passed to API
fix - An issue with missing test cases from the same test suite

Migrated to PHP API

• PHP API was moved to separate repository (https://github.com/allure-framework/allure-php-api)
• Adapter was refactored to support some changes in this API

Bugfixing release

• Fixed wrong annotation path when using Composer

First public version

Contains initial adapter implementation including PHP API for Allure 1.4.x series.