tag_parser.py:: tagAnd was added, expands to ifThanElse, tests were added respectively
Merge branch 'master' of https://github.com/eldardamari/CompilerPrinciples
merge
tag_parser.py:: tagLetrec was added, with additional 2 methods for reading scheme structures and creating scheme pairs, test_tag_
merge
reader.py:: support to comments where added
after merge with Dror