Configy: Implement soundexer-based key-matching in strict mode ...

This scales much better, e.g. when using Configy with dub's 54 config keys.

Add configy library, dyaml, tinyendian ...

Versions are:
- tinyendian v0.2.0
- dyaml v0.9.0
- Configy commit 361ca47 + PR34

vendor