Refactor ZFTool to use ZendDiagnostics.
Refactor all unit tests, remove redundant classes.
Fix composer.json - diagnostics controller tests need zend-http to work.
Merge branch 'master' of git://github.com/zendframework/ZFTool into feature/zend-diagnostics-refactor
Refactor for ZendDiagnostics 1.0, fixes and enhancements.

- Add support for skipped checks.
- s/test/check/
- Update docs.
- Refactor usage of console param aliases after the fix in ZF 2.2+.
- Fix checks filtering.
- Fix unit tests leaking diagnostic reporter output.
- Fix composer.json import of ZendDiagnostics.
CS Fixes.
Merge pull request #66 from Thinkscape/feature/zend-diagnostics-refactor

Refactor ZFTool to use ZendDiagnostics.