TestCase methods listing caching

[milo]

• bug fix? no
• new feature? yes
• BC break? no
• doc PR: no needed

This PR tries to solve #369 as follows.

Output of test method listing is now in format:

$ php tests/Framework/Assert.equal.recursive.phpt --method=nette-tester-list-methods

TestCase:RecursionTest
Method:testSimple
Method:testMultiple
Method:testDeep
Method:testCross
Method:testThirdParty
Dependency:D:\Web\dev\nette\tester\tests\Framework\Assert.equal.recursive.phpt
Dependency:D:\Web\dev\nette\tester\src\Framework\TestCase.php

The TestCase:... line is here only for check, that TestCase::run() method is run.

The Method:... lines are test methods, formerly as [testSimple,testMultiple,...].

The Dependency:... lines are new. It is a list of declaring files. TestCase class, all its parents and all traits. With such information the TestHandler can keep cache.

[milo]

@JanTvrdik Could you please test impact on speed?

[milo]

@JanTvrdik @matej21 Could you please test this branch? We would like to release 2.1 soon and this is a candidate for merge.