Refactor BO main object

This commit performs a major refactor of BO main object and objects that
support it. New methods were introduced to facilitate using this API in
more flexible ways, nevertheless, the same out of the box behavious is
still present keeping the package friendly.

Notable changes:
- New method register: A clean and consistent new api for the old
init/initialize. Basicallyu provides a way for users (internal and
external) to specify points with known target values. In the background
this is handled by the internal target space object.
- New method probe: A clean and consistent new api for the old explore
method. Basically provides a way for users to force the algorithm to
probe certain points in the parameter space. It can be done in a lazy
(default) fashion as well as immediately.
- Overhaul of target space object. This object was simplyfied and
cleaned, it is now a lot easier to read and use and interfaces well with
BO.

wip - obs insp refactor of bo object

slimdown target space object, easier to read and less bloat

maximize method leveraging observe, inspect and internal space

add events and improve prime queue method

fix bugs with maximize, now working

suppress gaussian process warnings

clean and improve max and res availability

organize events and define default events

universal as_array that can handle dict and array params

working refactoring of bo object

Author: fmfn