Move everything possible into XDG directories

With the help of xdg-ninja (https://github.com/b3nj5m1n/xdg-ninja)
we move all kinds of config/cache files into the XDG directories

.config/vim/after/ftplugin/python.vim

@@ -0,0 +1,65 @@
+" Set the search path to the folder of the current file and its sub-folders
+setlocal path=.,**
+" Exclude Python's compiled files from searches
+setlocal wildignore=*/__pycache__/*,*.pyc
+
+
+" TODO: This does not work, maybe because we spell out imports
+" as project-local imports (e.g. from lalib.fields import base)?
+" Include *.py files imported as modules when searching.
+" Source: https://www.youtube.com/watch?v=Gs1VDYnS-Ac
+set include=^\\s*\\(from\\\|import\\)\\s*\\zs\\(\\S\\+\\s\\{-}\\)*\\ze\\($\\\|\ as\\)
+" 1) import foo.bar -> foo/bar.py
+" 2) from foo import bar as var -> foo/bar.py or foo.py
+function! PyInclude(fname)
+    let parts = split(a:fname, ' import ')  " 1) [foo.bar] or 2) [foo, bar]
+    let left = parts[0]  " 1) foo.bar or 2) foo
+    if len(parts) > 1
+        let right = parts[1]  " only 2) bar
+        let joined = join([left, right], '.')
+        let fpath = substitute(joined, '\.', '/', 'g') . '.py'
+        let found = glob(fpath, 1)
+        if len(found)
+            return found
+        endif
+    endif
+    return substitute(left, '\.', '/', 'g') . '.py'
+endfunction
+setlocal includeexpr=PyInclude(v:fname)
+setlocal define=^\\s*\\<\\(def\\|class\\)\\>
+
+
+" Number of spaces used for each step of auto-indent
+set shiftwidth=4
+
+" Number of spaces a <Tab> counts for in the file
+set tabstop=4
+
+" Number of spaces a <Tab> counts for in editing mode
+set softtabstop=4
+
+" Change <Tab>s into spaces
+set expandtab
+
+" Copy indent from previous line when starting a new line
+set autoindent
+
+" Use indent according to the syntax of the open file
+set smartindent
+
+" Auto-wrap lines after 88 characters, which is PEP8's limit plus 10%,
+" a more relaxed boundary which occasionally may be used
+set textwidth=88
+
+
+" Make column 80 red to indicate PEP8's maximum allowed line length
+set colorcolumn=80
+
+" Additionally, give every character beyond 80 columns a red background
+highlight ColorColumn ctermbg=DarkRed
+call matchadd('ColorColumn', '\%80v', 100)
+match ErrorMsg '\%>80v.\+'
+
+
+" Show line numbers by default for .py files
+let g:show_numbers=1