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

Jason K. MacDuffie 9eb56846c5 rename tests for 12.22 7 月之前
aop 61bf9b0748 implement hash tables 7 月之前
exercises 9eb56846c5 rename tests for 12.22 7 月之前
.gitignore a2e1d44ea4 start work on a test framework 7 月之前
Makefile 825f0a6765 update makefile 7 月之前