Reorder files for PlatformIO to work with this lib and fix include paths

[arduino12]

No description provided.

[Pillar1989]

@arduino12 can you talk more about your PR ?

[arduino12]

Hi,

Thanks for your quick response!
I love working with platformio, each project have platformio.ini configuration file,
This file can contain:

lib_deps =
    ${env.lib_deps_builtin}
    ${env.lib_deps_external}
    https://github.com/me-no-dev/ESPAsyncTCP.git
    knolleary/PubSubClient@^2.8
    paulstoffregen/OneWire

And pio takes care of cloning and including the repo into the Arduino environment!

But when using this lib or the one of elechouse, it only clones the PN532 folder - discarding the other PN532_* folders..

lib_deps =
    Wire
    SPI
    SoftwareSerial
    https://github.com/don/NDEF.git
    ; https://github.com/adafruit/Adafruit-PN532.git ; compiles
    ; https://github.com/Seeed-Studio/PN532.git      ; complain missing PN532_I2C.h and other headers
    ; https://github.com/elechouse/PN532.git         ; complain missing PN532_I2C.h and other headers
    https://github.com/arduino12/PN532.git           ; compiles (this is my PR)

I think it is related to a backward-compatibility stuff - old arduino libs structure:

|--PN532
  |--docs
  |--examples
  |--PN532
    |- PN532.c
    |- PN532.h

But now it need to be like:

|--PN532
  |--docs
  |--examples
  |--src
  |  |- PN532.c
  |  |- PN532.h
  |-- library.properties

Please see the files I changed and moved in my PR for full understanding-
now I can confirm my PR compiles with pio and works on my hardware :)