A bit of writing on the bus. This may change later.
Added a bit about first/rest on mixed and nested lists
a bit on sequences/collections, not finished
added more to sequences stuff
separated the section into two files
Made changes suggested by Stephen.
Added an exercise on vectors and lists
more on sequences
finished a section on implicit seq
a section on seq? and coll? in progress﻿
more on converting between sequences and vectors
Finished the section on converting to vectors and lists.
started a subsection on writing "third"
Finished the prgramming example.
A few edits
Added exercises