Preserve --dir parameter after updating
Allow more than one copy of a command line parameter in MultiMC
Linux runner script no longer changes current directory, which allows '--dir .'
Fixed unit tests, removed the obsolete one (for some legacy updater command line params that were also removed)
[fixes 63127704]
Updater tests for path utils
The updater now doesn't use splitpath on Windows (fixes problems with Windows XP)
Fix up paths for the OSX updater - should now install the updates into the right place
Fix translations install path - translation isntall and deploy should be fixed
