Refactor Project & fix bugs

[conorthedev]

• Clean up Tweak.xm a bit
  • Remove redundant comments
  • Reformat code
  • Rename some unclear variables
  • Move %init to %ctor
• Add Tweak.h
• Use non-deprecated methods in qapRLC.m
• Remove .theos and packages
• Add .gitignore
• Move imports to headers in Preference Bundle
• Use after-install:: instead of INSTALL_TARGETS_PROCESS=
• Fix #6
• Make preferences respringless
• Remove all .DS_Store files because they're ew

This has been tested on my device, and all is working correctly.