homework of chapter-1 without checking
add directory for each chapter
add exercise 1-2, 1-3, 1-4, 1-5
add .gitignore files to filter vim swap files and emacs middle files
add the description for sicp-1-21
Merge branch 'feature/chapter-1' of github.com:DomeCharl-Wei/my-sicp into feature/chapter-1
add search-for-primes for range
fix the even bug
use prime? method instead of fast-prime?
add a method for finding the three smallest primes
add sicp-1-23.ss
add the explaination for normal-order
add sicp-1-24
add sicp-1-25.ss
add function square
add the explaination for sicp-1-25
add the annotation code
add carmichael? function and test carmichael numbers
make sure n is not prime before carmichael testing
add miller-rabin-test for primality testing