Add installation and build instructions to README, and Makefile for developers
Simplify introduction and bring in line with README
Remove a random blank line.
Use kvoptions package instead of custom code for package options.
Simplify presentation of driver code.
Minor improvements to pacsample.tex.

Break out \usepackage's on to separate lines so it's easier to fiddle
with invocation of adobecaslon.

Now that Caslon is \rmdefault by \default, remove command to select
it.

Clarify formatting slightly.
Change semibold to a package option rather than a default.
Add expert fonts support.
Use macros consistently to type "LaTeX" etc.
Bump version & date, and acknowledge contributions to v2
Always write package names with \textsf.
Add fake smallcaps for base fonts.