Add editorconfig and fix issues

.ecrc

@@ -0,0 +1,6 @@
+{
+  "Exclude": [
+    ".git",
+    "LICENSE"
+  ]
+}

.editorconfig

@@ -0,0 +1,16 @@
+root = true
+
+[*]
+indent_style = space
+indent_size = 2
+tab_width = 2
+end_of_line = lf
+charset = utf-8
+trim_trailing_whitespace = true
+insert_final_newline = true
+
+[*.md]
+trim_trailing_whitespace = false
+
+[Makefile]
+indent_style = tab