Preparing alpha state

#4 feature branch.

**Changeset**:
- [ ] phpcs2 (dev; current alpha tag broken for composer)
- [ ] dropped namespaces (compat issues)
- [ ] dropped abstract sniff (autoloading issues)
- [ ] fixed testsuite (reporting issues)

**TODOs**:
- [ ] fix issues reported by test suite (7 out of 11 sniffs fail)
- [ ] test non-git install
- [ ] prepare feature review (assumed incomplete)