* Allows values to be numpy arrays
* Bugfix: Slider now works when limits didn't change during `optsChanged`
* Improved testing + layout of param tree example
* Also fix numpy-like values in list `setValue`
* use proper hex formatting for value
* Fix code warnings
* Avoids use of configfile in parametertree
* Avoid shadowing variable names
* Add explanatory comment to `makeAllParamTypes`
* Allow string options to be 'unset' in file, etc. parameters example
* Bugfix: unintunitive option unsetting for file window title
* don't use lambda in signal connect
* Remove unused import
