Demonstrations created with a list of functions

Never cared for forcing the names of functions...especially when we
duplicated the function's body. Now a "presentation" is simply a list
of functions to call in order. Much simpler and easier to make.
Better newline functionality

Can't believe I didn't think of this before, but being able to enter a
newline...even if you are in the middle of the current line...seems like
a great idea.