Libraries and exercises pertainin to Scheme and the Art of Programming by Springer & Friedman

Jason K. MacDuffie 9eb56846c5 rename tests for 12.22 10 月之前
aop 61bf9b0748 implement hash tables 10 月之前
exercises 9eb56846c5 rename tests for 12.22 10 月之前
.gitignore a2e1d44ea4 start work on a test framework 10 月之前
Makefile 825f0a6765 update makefile 10 月之前