fixed PHP Reporter to export raw coverage (enables merging)
Merge pull request #240 from omigos/2.0

Fix merging of PHP coverage reports
filter out non-files

Non-files, such as eval'd code, can cause code coverage to fail. Test whether a filename is likely to be a file (with Filter::isFile)
when checking whether a file should be filtered from code coverage
Fix CS/WS issues
Add missing @covers annotation; correct assertion method names
Merge branch '2.0'