Add editorconfig (#114)

.editorconfig

@@ -0,0 +1,28 @@
+# EditorConfig is awesome: http://EditorConfig.org
+# Uses editorconfig to maintain consistent coding styles
+
+# top-most EditorConfig file
+root = true
+
+# Unix-style newlines with a newline ending every file
+[*]
+charset = utf-8
+end_of_line = lf
+indent_size = 2
+indent_style = space
+insert_final_newline = true
+max_line_length = 80
+trim_trailing_whitespace = true
+
+[*.md]
+max_line_length = 0
+trim_trailing_whitespace = false
+
+# Tab indentation (no size specified)
+[Makefile]
+tab_width = 2
+indent_style = tab
+
+[COMMIT_EDITMSG]
+max_line_length = 0
+