Status of Bluetooth for ESP32

Has been a long time since last push to github, but today its done.
I'm a lazy guy in documentation :-(
Let me copy commit message here:

First of all, thanks to Gordons help in SW, discussions, hints, .... …
…and last not least 2 PUCK's
Without Gordons support, this port would have never happened.
General:

• Status from my point of view is still early.
  
• Server, Client, Advertising can be used, and are running at least with a Puck or NRF-connect on the other side
  
• waiting for ESP-IDf V3, and waiting and....
  
• Bluetooth needs much memory, size of binary is 1172 right now
  
• vars need to be reduced to 2000, for boards with wrover module this can be extended to 20000 or more
  
• some minor but helpful changes in core sources of Espruino
  
  

Added:

• GATTC support
  
• Advertising
  
• support malloc for vars, instead of static allocation
  
• use of additional 4mb PSRAM (if available) to have 20000 vars
  
• support lists in ifdef for Javasript wrapper, so "ifdef" : "NRF52,ESP32" are possible
  
• some more documents, should be more, but I'm a lazy guy :-(
  
• new manual for install
  
• lot of internal changes to make it more C-style
  Open items
  
• much more testing and testers
  
• no support for BlueTooth UART
  
• several NRF commands are not supported
  
• reset of Bluetooth and UART in jshreset crashes from time to time, therefore UART reset is switched off
  
• discuss how changes in core sources, mainly lib/bluetooth/* can be reduced
  
• some people offered help in forums, good time to start now ;-)
  
  

Changes to be committed:

modified:   boards/ESP32.py
modified:   libs/bluetooth/bluetooth.h
modified:   libs/bluetooth/bluetooth_utils.c
modified:   libs/bluetooth/jswrap_bluetooth.c
modified:   libs/bluetooth/jswrap_bluetooth.h
modified:   make/family/ESP32.make
modified:   make/targets/ESP32.make
modified:   scripts/build_platform_config.py
modified:   scripts/common.py
modified:   src/jsvar.c
modified:   src/jsvar.h
modified:   targets/esp32/BLE/esp32_bluetooth_utils.c
modified:   targets/esp32/BLE/esp32_bluetooth_utils.h
modified:   targets/esp32/BLE/esp32_gap_func.c
modified:   targets/esp32/BLE/esp32_gap_func.h
modified:   targets/esp32/BLE/esp32_gattc_func.c
modified:   targets/esp32/BLE/esp32_gattc_func.h
modified:   targets/esp32/BLE/esp32_gatts_func.c
modified:   targets/esp32/BLE/esp32_gatts_func.h
modified:   targets/esp32/bluetooth.c
modified:   targets/esp32/docs/Bluetooth/sdkconfig
modified:   targets/esp32/jshardware.c
modified:   targets/esp32/jswrap_esp32.c
modified:   targets/esp32/jswrap_esp32.h
modified:   targets/esp32/main.c