match klehman-rally/pyral master (#192)

* working on getting in and between query conditions working when there are other conditions

* fixed multi condition query where subset and / or range condition(s) are involved

* README and doco inclusion

* generated stuff for 1.5.2

* final generated elements for this 1.5.2 release

* incorp typo fix Revison to Revision in entity.py from Yevgen Lasman

* more work on quasi-hackathon project of release_start_items.py

* fixed getting current feature state values in the idenfityVariance... function

* first complete good run for inception, current an d variance.  extra print on variance items where Name or State/ScheduleState not set for troubleshooting purposes

* minor mods, restapi.py mod to not assume last element of _ref is on ObjectID int value

* minor adjustments to test_allowed_values.py, pyral/context.py and examples/periscope.py

* updated to 1.6.0

* adjusted test for query of PR to retrieve a more selective set

* updated string construction on a few modules to be mostly f-string

* updated test_pull_request_copied.py

* fixed WS_VER to have ending slash

* minor change in restapi.py to get rid of some commented out lines, update the README.rst changes section

* Added Objective, KeyResult, Risk and CapacityPlan* entities to entity.py. Fixed restapi.py Rally.getAllUsers method. search is no longer supported by the WSAPI.
systematic replacement of string formatting with use of f-string constructs.
Updated explicit support for Python 3.9, 3.10 and 3.11

* release candidate 1 for 1.6.0 release

* update README.rst to include mention of supporting 3.12

* fixed stray specific value for example

* small mod to README.rst

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Co-authored-by: kiplin.lehman@broadcom.com <kiplin.lehman@broadcom.com>

Author: klehman-rally