Update the documentation and tests to say "fithesis4"

Makefile

README.md

example/mu/example.dtx

fithesis.dtx

fithesis.ins

guide/mu/guide.bib

guide/mu/guide.dtx

guide/mu/resources/empty.tex

style/mu/base.dtx

test/mu/compare/base-10pt.tex

test/mu/compare/base-11pt.tex

test/mu/compare/base-12pt.tex

test/mu/compare/base-digital.tex

test/mu/compare/base-printed.tex

test/mu/compare/econ-bibliography-solicited.tex

test/mu/compare/econ-bibliography-unsolicited.tex

test/mu/compare/econ-czech.tex

test/mu/compare/econ-english.tex

test/mu/compare/econ-oldtable.tex

test/mu/compare/econ-slovak.tex