Change capitalization of todo heading + bullet points

readme.md

@@ -1,6 +1,6 @@
 # Paper computer simulator experiment
 
-## TODO
+## To do
 
 Computer:
 - [ ] Implement carry flag on SUB
@@ -41,15 +41,15 @@ Assemble and run, with debug output:
     E   CHP ————   ; carry hop ... skip next instruction if Carry Flag is set ... when true: IP <- PC + 2
     F
 
-- instructions are two bytes long:
+- Instructions are two bytes long:
   one byte for the opcode, one for the argument    
 
 
 ### Nice features that didn't fit
 
-- hop `IF<` and hop `IF>`
+- Hop `IF<` and hop `IF>`
 - `MUL` and `DIV`
-- rotates and shifts
+- Rotates and shifts
 
 ## Registers and Flags
 
@@ -69,7 +69,7 @@ Assemble and run, with debug output:
 
 ### Maybe someday
 
-- timer (for a version in software/electronic-hardware)
+- Timer (for a version in software/electronic-hardware)
 
 ## Assembly language