Remove installation instructions for non-TDS-compliant systems, adding
clarity, and add a disclaimer for non-TDS-compliant systems.
Don't add LaTeX commands to pac-drv.tex or pac-map.tex, so they can be run with fontinst.
Add files generated by fontinst to .gitignore
Make rmdefault the default behaviour.
Fix setting and reading of version information in adobecaslon.dtx/sty.
Clarify installation instructions further.
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.