Grscheller.fp

* added modules lazy and state
* simplifications done to fp.iterables module
* renamed flatmap methods to bind
* minor MB and XOR updates/corrections

* added fp.function module
* combine and partially apply functions as first class objects
* some tests may be lacking

* breaking API changes, next PyPI release will be 1.1.0.
* renamed module `nothingness` to `singletons`
* split class NoValue into class NoValue and Sentinel
* `noValue` represents a missing value
* `_sentinel` is intended to provide a "private" sentinel value
* frees up `None` and `()` for application use
* avoids name collisions with user code
* will be used in grscheller.datastructures
* will redo docs in docs repo

* removed docs from repo
* docs for all grscheller namespace projects maintained here
* https://grscheller.github.io/grscheller-pypi-namespace-docs/

* decided to make this release first stable release
* renamed module fp.woException to fp.err\_handling
* better captures module's use case
* pytest improvements based on pytest documentation

* long overdue PyPI release