Fix small issues

[halotroop2288]

Using my limited knowledge to fix smaller issues. 💪🏻

Fixes

• Defines the behavior of ByteSwap based on the compiler in use, based on advice in this comment.
  • This should fix part of Visual Studio integration. But it's only one of many issues I came across.
  • fixes What Am I doing wrong? #17
• Fixed the typo as described in Typo in the README #8, which was confirmed by @blueskythlikesclouds.
  • fixes Typo in the README #8
• Fixed Devkit XEX Decryption.
  • Patch created by @I-asked.
• Fixed Xex2ImportDescriptor Layout, as pointed out by @ran-j in Segmentation fault using XenonAnalyse #15.
  • This seems to get us further along in the process, but my debugging skills are lacking.

Additional Notes

I made a few changes as suggested by the IDE

• inline is implied by template
• else is redundant after return
• return value; is unreachable after assert(false && ...)

[blueskythlikesclouds]

Hmm, I couldn't get the devkit code to execute, is the check correct?

Xenia seems to try two times and goes with whichever manages to succeed: https://github.com/xenia-project/xenia/blob/3d30b2eec3ab1f83140b09745bee881fb5d5dde2/src/xenia/cpu/xex_module.cc#L938

Maybe to validate that the decryption succeeded, it could try to validate the PE header, but I don't know if that's something that'd work consistently across games.