Add editorconfig to project

.editorconfig

+# We don't want users to overwrite configs with their own file
+root = true
+
+# Define rules for all filetypes
+[*]
+# We want to indent with tabs to allow users to individually set the tab width
+indent_style = tabs
+# We want clean linux style line breaks
+end_of_line = lf
+# Make sure all files have the right charset
+charset = utf-8
+# Nobody needs trailing whitespaces at the end of a file
+trim_trailing_whitespace = true