As suggested by mcartoixa at forums. This helps 3rd party software to find the Cppcheck in Windows environment. Note that this commit writes to HKCU instead of suggested HKLM.
Translation files are build to gui source directory not gui build directory. Also remove non-existing French translation file from installer.
Help viewer requires help dll and couple of deoendent dlls to be installed also.
Patch submitted by Tim Gerundt.
Remove runtime files installed by earlier InnoSetup installer. These runtime files might be different versions and might conflict with versions installed by the MSI installer. Better to be on safe side here.
Innosetup installer was removed earlier but some files related to it were not removed.