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

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