Add (z)sh vim file-path syntax-matching.

vim/(matches.syn, ftplugin/(zsh, sh).vim)
	-Add a `Synclude` syntax rule for file paths in zsh/sh shell
	scripts.
Remove leading asterisks from Vim C comments.

tmux/(statusline.conf, weather.py)
	-Move styling for the tmux statusline's weather segment from
	`statusline.conf` to `weather.py`, so that padding disappears
	when the script fails to execute (due to a lack of internet
	connectivity, for instance).

vim/(ftplugin/c.vim, scripts/DoxygenUtility/autoload/DoxygenUtility.vim,
	templates/c_h.tmp)
	-Substitute Vim's leading " * " string in C comments with a hard
	tab.
Fix nested func return in PythonDocUtil.

vim/scripts/PythonDocUtil/autoload/PythonDocUtil.vim
	-`s:InsertFunctionComment()` incorrectly inserted a
	documentation section for `return`/`yield` statements in
	sub-functions, instead of ignoring them. Fix by restricting the
	indentation level preceding such statements in the appropriate
	regex match.