Compatible with PHPUnit 7

Merge pull request #27 from lolli42/phpunit-7

[TASK] phpunit 7 compatibility

Fix bugs with nested suites

Merge pull request #26 from lolli42/recursive-suites

[BUGFIX] Suite nesting may fatal

Compatible with PHPUnit 6

Fixed: Compatible with PHPUnit 6

Compatible with PHP7

Fixed: Compatible with PHP7
Fixed: Compatible with a bigger range of PHPUnit versions

Default behavior is the same as regular PHPUnit

Changed: same behaviour as PHPUnit by default
Added: new 'order' parameter to choose the random order. You can choose the seed with '--order rand:123'
Deleted: old 'seed' parameter
Improved: refactoring

Fixed autoload paths in binary file

• Fixed: path for autoload file when installing library as dependency through Composer
• Fixed: path for autoload file when installing library as standalone