Italian Localization Update

I've updated the Italian translation of the program using Qt linguist.
Merge pull request #882 from DeRobyJ/stable-1.0

Italian Localization Update
Bump version to 1.0.3
Merge pull request #922 from diizy/stable-1.0

Bump version to 1.0.3
Fix Zyn GUI hard crash on Win32

I can't explain why @tobydox doesn't have to do this in his builds but committing to push ahead with 1.0.3
Merge pull request #928 from tresf/stable-1.0

Backport to 1.0 branch - Fix Zyn GUI hard crash on Win32
SWH/BodeShifterCV: fix out-of-bounds array access

The xcoeffs array only has 100 elements and thus accessing xcoeffs[100]
leads to undefined behaviour.
Added support for winpthreads library

Recent builds of MinGW64 runtime include the winpthreads library which
is not linked statically anymore and thus doesn't required non-portable
(de-)initialization function calls.
Install winpthreads DLL

Install winpthreads DLL for inclusion in Win32/Win64 installer. Requires
latest version of mingw-x-runtime packages (>=3.1.0).
VstBase: include 32 bit version of libwinpthread DLL for RemoteVstPlugin32

This is required with latest mingw-x-runtime packages.