qcollect 0.4.1

Collections; Collection-Traits.
# qcollect

### [API Documentation]http://qrlpx.github.io/qcollect/qcollect/

## TODO
* panic-safety? 
* add serde-serialization feature?
* common `Set`-methods
* `VecMapAdaptor`
* `Bit[Set|Vec]Adaptor` ?
* Examples, Tests, Docs
* Benchmarks?