PSR-4 Migration

- Moved module structure to PSR-4
- Updated test harness:
  - Don't use ZF2 autoloader; not required when composer is used
  - Move phpunit.xml to root directory
- Added file-level docblocks with license, copyright
Added branch alias

- dev-master => 1.0-dev
- updated install instructions to use ~1.0-dev
Added php-cs-fixer configuration

- Modified travis script to use php-cs-fixer from composer, using supplied
  configuration
Merge branch 'feature/psr-4'

PSR-4 migration, and revised QA toolchain