update readme

README.md

@@ -29,6 +29,7 @@ takes the difficulty out of creating custom brute force jobs
 add user-level racket dir to your PATH
 ```bash
 export PATH=$HOME/.racket/$(racket -e "(displayln (version))")/bin:$PATH
+export CROSSFIRE_DEVEL=1
 ```
 
 install package from repo, and build the agent binary (and place it into the development state dir)
@@ -75,7 +76,7 @@ cd meow2
 ```
 
 edit config `manifest.rktd`
- - change `(mode stdio)` to `(mode callback)` (stdio mode isn't working yet)
+ - change `(mode stdio)` to `(mode callback)`
  - change `(command ...)` to `(command "./meow")`
 
 generate files (Makefile, crossfire.c, crossfire.h -- these are support code for running your code
@@ -151,7 +152,7 @@ contributions welcome,,,,
     - ✅ data types: using data/integer-set, pattern (vector of integer-set)
     - ✅ basic manipulation functions
     - ✅ representation of input space as a flat integer
-- ✅ #lang for configuration/definitions
+- ✅ <del>#lang</del> for configuration/definitions
     - ✅ (input) mode
         - ✅ stdio: user program gets input by stdio, integers separated by space, one per line
         - ✅ callback: input generator compiled into user program, user main calls `crossfire_main`