updates after lecture 1

info/labs/amy-specification/semantics.tex

info/labs/amy-specification/syntax.tex

info/labs/amy-specification/types.tex

info/labs/amy_reference_compiler.md

info/labs/amyc-assembly-1.7.jar

info/labs/lab01/lab01-description.md

info/labs/lab01/lab01-slides.pdf

info/labs/lab01/lab01.zip

info/labs/lab01/library/List.scala

info/labs/lab01/library/Option.scala

info/labs/lab01/library/Std.scala

info/labs/lab01/material/SymbolicTreeModule.scala

info/labs/lab02/lab02-description.md

info/labs/lab02/lab02-slides.pdf

info/labs/lab03/lab03-description.md

info/labs/lab03/lab03-slides.pdf

info/labs/lab03/material/scallion-playground.zip

info/labs/lab03/material/scallion.md

info/labs/lab04/lab04-description.md

info/labs/lab04/lab04-slides.pdf