Future Enhancements to DINK32



 Write a dinkle DINK little endian version based on current cvs dink32

 Implement a new command that will specify the beginning
   and end of stack and specify the location available for downloads.
   - implement a real "sp" in r1 for the user

Add malloc/free to dink.  Make it callable by user code also.
   Might need separate heaps for user vs. dink.  


New Dink32 command to dynamically turn the ICACHE and/or DCACHE on or off for Dink32 (not the go target). dinkcache (dc)on|off. Currently available 
via enviornment variables.