modify examples for use in big test suite; performance; ELFCLASS64 support

I plan on running all 6 scripts in examples/ on a set of 967 32-bit ELF binaries for future commits.

I may release the test script itself, once it's cleaned up. For now I just use it to make sure I don't break stuff and to compare performance.

The changes in indirectJmpWithMemoryData.py are an attempt make code more concise. Performance improvement was only about 3%, but run time is dominated by some functions in ElfParserLib anyway.