Streamlined QA tools

- Removed coveralls support (not using, due to lack of availability of service)
- Removed unused development dependencies
- Removed bin/check-cs.sh (not needed, as php-cs-fixer allows passing the config
  file now)
- Removed psr0 from fixers (since we're following psr4)
CS fixes

- Trailing whitespace
- Unused use statements
Re-add zend-console requirement

- Used in ApiProblemListenerTest
Merge branch 'feature/streamline-tools'

Streamlines QA tools.