[trunk] Removing unused variables
[trunk] Adding MakeFile build of PosixSharedLibrarySymlink. Not quite right with working directories though
[trunk] QMake builder now looks for the Posix linker symlink rather than a static import library to link against
[trunk] Write dynamic library version numbers into QMake .pro files
[trunk] Xcode option values containing the @ symbol need to be quoted
[trunk] Xcode options for the install name, current version and compatibility version
[trunk] Empty build rule for Xcode posix shared library symlinks