Fixing crash when parsing blank NDEF messages
New 'read tag UID + NDEF' mode for faster reads
- new mode parses tag memory on FloJack and only transmits UID + NDEF message to iOS
- minimizes number of bytes transmitted across audio bridge which increases speed + stability for an overall better user experience
- 'read tag all memory' mode still functional for tag inspections and other use cases that require full data payload
- Performance improvements based on reading NTAG 203 (168 bytes)
  - tel://5615559334 (19 bytes + 7 byte UID = 26 bytes, 84.5% reduction)
  - http://goo.gl/P2TH (21 bytes + 7 byte UID = 28 bytes, 83.3% reduction)
  - etc