Bug when parse an external android package record

[jhzzzz]

Hi, thanks for your library, it do helped me save a lot of time.

Just found a little bug, when parse a ndefmessage buffer which incude an external type of android package like android.com:pkg with payload com.blabla, it will failed with chunk not support.

the reason is NdefMessage.swift line 201:

typeIndex += 1; changed to typeIndex += typeLength; is ok.

[dshalaby]

Hi - thanks for noticing this and suggesting a fix. We'll look into that. So glad you found the library useful!