Fixes I needed to get this running

[dan-v]

First of all, thanks for writing this tool! I had a few issues getting it running, so I figured I'd at least document the changes I needed.

• Fix build error with iokitnative.go. Was seeing this issue:

./iokitnative.go:119: cannot use numberRef (type C.CFNumberRef) as type C.CFTypeRef in argument to func literal
./iokitnative.go:130: cannot use numberRef (type C.CFNumberRef) as type C.CFTypeRef in argument to func literal

• Change location of kext to /Library/Extensions/HoRNDIS.kext (OSX Sierra fails to load kext otherwise due to being unsigned). Might not want this change if you want to support older versions of OSX. Fix was found here : 10.11  jwise/HoRNDIS#42). Was seeing this issue:

└─(Extensions)-> sudo kextutil HoRNDIS.kext/
Diagnostics for /System/Library/Extensions/HoRNDIS.kext:
Code Signing Failure: not code signed
Untrusted kexts are not allowed
ERROR: invalid signature for com.joshuawise.kexts.HoRNDIS, will not load

• Update README clarifying the ordering of the phone vendor and product id in the plist file.