Let hybrid properties, that are settable, be used when patching or posting.
Clarifies which arguments can be modified in-place.

This is a partial fix for #365.
Collapse all checks into single condition in _is_msie8or9().
Fixes #368: Adds missing documentation on custom queries.
Moves subsubsection up to its own subsection.
Merge pull request #360 from TimotheeJeannin/inspection-api

Let hybrid properties, that are settable, be used when patching or posting.
Adds changes due to previous commits.
Prepares for version 0.15.0 release.
Bump version number to 0.15.0
Set development version number to 0.15.1-dev
Fixes #367: catch IntegrityErrors in all methods.
Add python 2 and python 3 classifiers in the setup.py file.
Merge pull request #369 from TimotheeJeannin/master

Add python 2 and python 3 classifiers in the setup.py file.
adding NotAuthorized Exception to query construction
adding NotAuthorizedException to import
fix
allowing preprocessors to optionally modify and return their inputs
removing returned_values for postprocess
taking return value for postprocessors
never log exceptions. no exceptions.