Keymap: handwired/108key_trackpoint Configurator support and readme update (#4633)

* handwired/108key_trackpoint: Configurator support

* handwired/108key_trackpoint: readme update

- fix typo in make command
- rename file to lowercase

keyboards/handwired/108key_trackpoint/readme.md

@@ -0,0 +1,23 @@
+# 108 Key with TrackPoint
+
+![wiring](https://raw.githubusercontent.com/qmk/qmk.fm/gh-pages/keyboards/handwired/108key_trackpoint/wiring.JPG)
+
+This is based off the handwired/trackpoint keyboard and generated code from [Keyboard Firmware Builder](https://kbfirmware.com/).
+
+Keyboard Maintainer: [mkem114](https://github.com/mkem114)  
+Hardware Supported (tested): Teensy++ 2.0
+
+Make example for this keyboard (after setting up your build environment):
+
+    make handwired/108key_trackpoint:default
+
+See the [build environment setup](https://docs.qmk.fm/#/getting_started_build_tools) and the [make instructions](https://docs.qmk.fm/#/getting_started_make_guide) for more information. Brand new to QMK? Start with our [Complete Newbs Guide](https://docs.qmk.fm/#/newbs).
+
+You may have to modify the source code to suit 104 keys, RGB back-lights, different micro-controllers, or big ass enter.
+
+There are three keymaps:
+* qwerty with the four extra keys being: mute, media prev, media next, and media play
+* dvorak with the four extra keys being: mute, media prev, media next, and media play
+* dvorak_media with the caps lock being media play and the four extra keys being: mute, volume down, volume up, and media next
+
+To figure out how to wire your specific TrackPoint have a look out: [How to integrate a trackpoint in a mechanical keyboard](https://github.com/alonswartz/trackpoint).