doc: updated credits and changelog.

doc/changelog.dox

@@ -489,6 +489,7 @@ See also:
 -   Linker fixes for MinGW Clang (see [mosra/magnum#417](https://github.com/mosra/magnum/pull/417))
 -   Properly installing plugin binaries in Gentoo packages (see
     [mosra/magnum-plugins#85](https://github.com/mosra/magnum-plugins/issues/85))
+-   Warning fixes for MSVC (see [mosra/magnum#445](https://github.com/mosra/magnum/pull/445))
 
 @subsection changelog-latest-bugfixes Bug fixes
 

doc/credits.dox

@@ -105,6 +105,8 @@ Are the below lists missing your name or something's wrong?
 -   **[\@biosek](https://github.com/biosek)** --- documentation fixes
 -   **Borislav Stanimirov** ([\@iboB](https://github.com/iboB)) --- strict
     weak ordering for @ref Math types
+-   **Burak Canik** ([\@HaroldReyiz](https://github.com/HaroldReyiz)) --- MSVC
+    warning fixes
 -   **Cameron Egbert** ([\@cegbertOculus](https://github.com/cegbertOculus))
     --- fixes to Windows HiDPI support
 -   **Daniel Bloor** ([\@Bluer01](https://github.com/Bluer01)) --- setting old