Revert changes to make thread build for Windows Phone 8.0.
Phone isn't supported yet, so building just confuses users and has undefined behavior at runtime.
Support will be added later.

This reverts commit f832e4c54d732e24434e3d94d79f3df640e6608a.
Revert "Fix test failures and avoid overlong paths"

This reverts commit 19fdd6b4efb8bf5c4b8bea3cf1b4a1748ffabdfa.
Revert "Fix test failure for WINAPI_FAMILY"

This reverts commit a53eb9746b9eb6f146eb3c4da8bb58387f6e63b3.
Replacing MSOT copyright with Microsoft.
Removing default building for Windows store. This makes contributing individual libraries easier.
Use __declspec(thread) instead of Tls/Fls functions in WinRT and WinPRT

The Fls* family of functions is supported in Windows Store apps but not
in Windows Phone apps, however __declspec(thread) works in both so let's
use that instead.