Qt5

Blizzard's changes to Qt5. These changes are based off of the v5.9.3 tag.

Qt5 source is hosted at http://code.qt.io/cgit/. Qt5 is split into git submodules (referenced from a qt repository).

Blizzard's changes are limited to the following submodules:

• qtbase (https://github.com/Blizzard/qtbase)
• qtdeclarative (https://github.com/Blizzard/qtdeclarative)
• qtmultimedia (https://github.com/Blizzard/qtmultimedia)