Update to drashna keymaps and userspace (#2876)

* Fix Unicode sample

* Add irony mark

* Remove unpretty keymaps

* Add QMK DFU and Conditional Music Mode

* Unicode fixes

* Unicode fixes

* Make layer indication more modular

* Finish removing Faux Click

* Cleanup of UserSpace and addition of 'update_tri_layer_state' function

* Add modifier status indicators to Orthodox

* Remove tri layer function

* Minor tweaks

* Remove the Orthodox's Indicator's reliance on layer_state_set

* Add custom EEPROM settings

* Make EEPROM config more efficient

* Viterbi Config

* Add Iris Keyboard layout and Userspace cleanup

* Iris keyboard tweaks

* Use Grave Escape on Iris

* Update Readmes

users/drashna/readme.md

@@ -146,3 +146,31 @@ endif
 ```
 
 Then, if you run `make keyboard:name NO_SECRETS=yes`, it will default to the test strings in your `<name>.c` file, rather than reading from your file. 
+
+
+Userspace EEPROM config
+-----------------------
+
+This adds EEPROM support fo the userspace, so that certain values are configurable in such a way that persists when power is lost.  Namely, just the clicky feature and the Overwatch macro option ("is_overwatch").  This is done by reading and saving the structure from EEPROM. 
+
+To implement this, first you need to specify the location:
+
+```c
+#define EECONFIG_USERSPACE (uint8_t *)20
+```
+This tells us where in the EEPROM that the data structure is located, and this specifies that it's a byte (8 bits).  However, to maximize it's usage, we want to specify a data structure here, so that we can use multiple settings.  To do that:
+
+```c
+typedef union {
+  uint32_t raw;
+  struct {
+    bool     clicky_enable  :1;
+    bool     is_overwatch   :1;
+  };
+} userspace_config_t;
+```
+Then, in your C file, you want to add: `userspace_config_t userspace_config;`, and in your `matrix_init_*` function, you want to add `userspace_config.raw = eeprom_read_byte(EECONFIG_USERSPACE);`
+
+From there, you'd want to use the data structure (such as `userspace_config.is_overwatch`) when you want to check this value.  
+
+And if you want to update it, update directly and then use `eeprom_update_byte(EECONFIG_USERSPACE, userspace_config.raw);` to write the value back to the EEPROM.