Merge pull request #177 from EDCD/enhancement/add-editorconfig

Add .editorconfig to enforce some standards & begin docs/Contributing.md

.editorconfig

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+# This is the project top-level .editorconfig
+root = true
+
+# Defaults for all file types
+[*]
+# 4-space indents, no TABs
+indent_style = space
+tab_width = 4
+indent_size = tab
+
+# Hard-wrap at 120 columns
+max_line_length = 119
+
+# Unix EOL, single \n
+end_of_line = lf
+
+# UTF-8 is the only sensible option, no BOM
+charset = utf-8
+
+# All files should have a final newline
+insert_final_newline = true

docs/Contributing.md

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+# Contributing to the EDDN Project
+
+## Introduction
+
+This file is still mostly a stub.
+
+## Text format
+
+The project contains an `.editorconfig` file at its root.  Please either ensure
+your editor is taking note of those settings, or cross-check its contents
+with the
+[editorconfig documentation](https://github.com/editorconfig/editorconfig/wiki/EditorConfig-Properties)
+, and ensure your editor/IDE's settings match.