Changes

Enhancement/GenericStyle:

- NativeLibrary:
  - add isValidNativeLibraryName(..)
  - generic style

- Platform
  - add getOSAndArch(), getOSAndArch(..)

- IOUtil
  - add getClassFileName(..)
  - add getBasename(..)
  - add getDirname(..)
  - added doc

- ReflectionUtil
  - generic style

Enhancements / New utils: JarUtil, TempFileCache and TempJarCache

JarUtil:
  Utility to handle Jar files and it's content, incl. extracting it's entries

TempFileCache:
  Utility to have a save temporary file cache per JVM and per instance,
  eg. per ClassLoader.
  The temp cache is cleaned up with the next usage of TempFileCache,
  which solves the troubles of JVM bugs and situations where the JVM
  is not able to close and delete open temp files.

TempJarCache:
  Utility to cache Jar files temporary (using TempFileCache)
  and access it's content.
  This class is suitable to implement a URLClassLoader
  or similar resource loading facilities.

All tested w/ TestTempJarCache