* added bug report and feature request issue tempaltes
* copied pull_request_template.md to .github folder
* Updated the DateCalculation narrator logic to use PropertyChangedCallbacks for the DateResultLabel and DateDiffAllUnitsResultLabel TextBlocks.
* Reverted textblock callback changes and added an event handler for when the radio buttons are checked.
* Revert NarratorAnnouncement.h changes and removed unused code from DataCalculator.xaml.h. Updated comments in RaiseNotification method in DateCalculator.xaml.cpp
* Reverted changes in NarratorAnnouncement.h and NarratorAnnouncement.cpp
* Added SAL annotation to AddSubtractOption_Checked
* Remove namespaces from input types on AddSubtractOption_Checked
Before this change, the pchs for CalcViewModel and Calculator project referenced project headers. If those project headers (or any of their dependencies) were to change, then the pch would be recompiled, slowing local build times.
By removing references to project headers, the pch will be compiled once and is resilient to changes in the project. Now that project headers are explicit about their dependencies, when there is a change to a project header only the translation units referencing the modified header will need to be rebuilt.
- Manually tested by ensuring Calculator project builds locally.
@Microsoft/calculator-team
