Format everything

The next commit will add this to a `.git-blame-ignore-revs` file which
you can use to ignore this commit when running git blame. Simply run

    git blame --ignore-revs-file .git-blame-ignore-revs [...]

Or configure git to persistently ignore the commit:

    git config blame.ignoreRevsFile .git-blame-ignore-revs

.editorconfig

@@ -0,0 +1,8 @@
+[*]
+charset = utf-8
+end_of_line = lf
+insert_final_newline = true
+
+[*.{cpp,c,h,hpp}]
+indent_style = space
+indent_size = 4