restructure converters (#1825)

* restructure converters

each converter is its own keyboard and different hardware variants are different subprojects.

remove (seemingly) old method of loading layouts from main Makefile

* call led_set_kb() from overridden led_set()

* put converter back into one folder

* revert some structure changes to bring in line with #1784.

Also attempt to get the BLE thing more properly integrated.
Also also fix led_set() to call led_set_kb().

keyboards/converter/usb_usb/keymaps/ble/README.md

@@ -1,30 +0,0 @@
-QMK BLE Adapter
-===============
-A small device that reads USB keyboard input and passes it on over Bluetooth LE HID.
-
-![Picture of Adapter](https://i.imgur.com/O3VwBBJ.png)
-
-Hardware
---------
-The hardware is relatively easy to assemble. Just follow the schematic and don't forget to [cut the VBUS jumper](https://www.pjrc.com/teensy/td_libs_USBHostShield_4a.jpg).
-
-Schematic:
-![Schematic](https://i.imgur.com/s1Ia9We.png)
-
-Part list:
-* [Adafruit Feather 32u4 Bluefruit LE](https://www.adafruit.com/product/2829)
-* [USB Host Mini](https://www.circuitsathome.com/arduino_usb_host_shield_projects/)
-* [Pololu 5V Step-Up Voltage Regulator U3V12F5](https://www.pololu.com/product/2115)
-* [Lithium Ion Battery - 3.7v 2000mAh](https://www.adafruit.com/product/2011)
-* Some sort of switch to be able to turn it off
-
-Building and Flashing
----------------------
-
-```
-make converter-usb_usb-ble
-```
-
-```
-make converter-usb_usb-ble-avrdude
-```

keyboards/converter/usb_usb/keymaps/ble/config.h

@@ -3,13 +3,4 @@
 
 #include "../../config.h"
 
-#undef PRODUCT
-#define PRODUCT         QMK BLE Adapter
-#undef DESCRIPTION
-#define DESCRIPTION  
-
-// Turn off the mode leds on the BLE module
-#define ADAFRUIT_BLE_ENABLE_MODE_LEDS 0
-#define ADAFRUIT_BLE_ENABLE_POWER_LED 0
-
 #endif

keyboards/converter/usb_usb/keymaps/ble/rules.mk

@@ -1,3 +0,0 @@
-BLUETOOTH = AdafruitBLE
-ADAFRUIT_BLE_ENABLE = yes
-OPT_DEFS +=  -DCATERINA_BOOTLOADER