- Removed NSMethodSignature cache, not thread safe.
- Removed NSIndexPath cache, not thread safe.
- Moved NSPropertyListReader_vintage class caching into instance.
- Removed caching of page size in NSPageSize() for linux/solaris/darwin.
- objc cache entry initialization tweaks
- removed unused _selectorCount
- Moved NSBundle static _sharedLookInDirectoriesArray to per-instance
- Moved NSProcessInfo static _counter and _counterLock to per instance
- Uncommented NSClassDescription use of @synchronized as the compiler can handle it now.
- Remove _fontHolder from NSInterfacePartAttributedString
- declared some variables with static scope as static
