Finalize docs, and unbreak failed rebase

docs/split_keyboards.md

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+# Split Keyboards
+Split keyboards are mostly the same as unsplit and very easy to adapt a keymap for. Currently
+UART is supported, though other modes will come later such as Bluetooth and i2c.
+
+Useful config options:
+```python
+keyboard.split_type = "UART"  # Sets split mode to UART
+keyboard.split_flip = True  # If your boards are identical but one is flipped, this option is for you 
+keyboard.split_offsets = [6, 6, 6, 6]  # This is the how many keys are on each column on the "Master" half
+```
+
+## Master Half
+Choosing the master half can be done one of 2 ways. You can set this true or false if you only pleg in on one side.
+```python
+keyboard.split_master_left = True
+```
+
+## EE HANDS
+If you want to plug in on either side, it can be done fairly easily but requires setup. 
+
+On each half of your keyboard make a file called kmk_side.py and add one of these lines to the file
+depending on where each piece is physically located.
+```python
+split_side = "Left"
+OR
+split_side = "Right"
+```
+
+and then in your keymap, add the line
+```python
+from kmk_side import split_side
+```
+
+# UART
+To enable uart it's as simple as adding this line, of course changing the pin
+```python
+keyboard.uart = keyboard.init_uart(tx=board.SCL)
+```