preserves the characters outside ASCII.

`\def\thesis@locale{...}`, which also switches hyphenation patterns. The
macro definitions inside locale files are now global to account for the
fact that it now makes sense to include locale files on-site (and
therefore possibly inside a group) using the `\thesis@selectLocale`.

the version of the package, when it's being typeset.

of `\thesis@czech@declaration` for the Faculty of Arts into
`\thesis@lower{czech@...}`, so that the macro always expands to the
correct output regardless of the current locale.

This is merely a matter of consistency, since the style file of the
Faculty of Arts only uses Czech strings within the Czech locale.

style files of the Masaryk University, we no longer need the explicit
club and widow penalties in the guides.

to match the lower camelcasing of the rest of the keys.

the style loader from the `\thesis@load` routine to a new
`\thesis@requireStyle` macro to make the semantics of
`\thesis@requireLocale` and `\thesis@requireStyle` more similar.

theses. Instead, the `\ifthesis@blocks@assignment` conditional can be
set either by the subsequently loaded style files or by the user. So
far, only the `fi` and `sci` style files set the conditional.