Changelog:
+## Feb 11, 2016:
+
+* Updated ASCII legend for thumb clusters
+* Made it so outer left-hand thumb key is L1 momentary toggle
+* Added % and @ to L1
+* Swapped positions for _ and - on L1
+
+## Feb 5, 2016:
+
+* A whole new design for the symbol layer. Specifically:
+ * Put the minus, underscore, and semicolon right in the homerow for the right hand
+ * Parens are in better places for me
+ * The arrow keys now send Ctrl-PgUp and Ctrl-PgDn, for switching browser tabs with the arrows when in symbol layer
+ * Tab (right-hand outer thumb key) now does double duty to toggle symbol layer when held down
+ * Backspace (left-hand outer thumb key) now just toggles symbol layer (I wasn't using it as a backspace)
+
+
## Jan 19, 2016:
* Made J into dual-action key (Alt when held down), to make Alt-tab more ergonomic.