factor out the UI scaling computation from SetScalingResolution
use GetGUIScaling rather than SetScalingResolution when computing font size so as to not alter stored state
FIX: [droid] Handle mouse wheel
[WIN32] removed unused methods and some CStdString occurrence.
FIX: [droid] do not package non-standard joystick keymap
fixed: runtime check failure, time wasn't initialized.
Merge pull request #3666 from wsoltys/testsuite

[WIN32] fixed: runtime check failure, time wasn't initialized.
Merge pull request #3623 from jmarshallnz/font_scale_not_render_scale

Don't use SetScalingResolution when loading fonts
[WIN32] fixed: XBMC wasn't found on my setup with win 8.1. Updating the mdnsresponder helped. Since doPublishService is called by different threads guard the service creation to avoid multiple inits.
Merge pull request #3661 from wsoltys/cstdstring

[WIN32] removed unused methods and some CStdString occurrence.
fix: don't set <width> from parent if no <left> is specified
[Confluence] cosmetics
Merge pull request #3668 from jmarshallnz/skin_position_fix

Skin position fix
[addons] fix TranslateSingleString to be more robust to badly formatted strings
[pvr] fixes GetDirectoryFromPath() - don't consider slashes as first character
URIUtils::RemoveExtension didn't account for slashes after an extension, so could chop everything after the period in paths like /some/path.foo/some/other/folders/
Merge pull request #3670 from jmarshallnz/find_fixes

Find fixes
Don't flicker infomanager strings.

Just use the old values unless we're really busy.
[transforms] cleanup the transform stack to eliminate unnecessary copies.
[transforms] extend the UI transform with the font scaling amounts