Add editorconfig

Fixes GH-2.

.editorconfig

@@ -0,0 +1,78 @@
+# EditorConfig helps developers define and maintain consistent
+# coding styles between different editors and IDEs
+# editorconfig.org
+
+root = true
+
+[*]
+charset = utf-8
+end_of_line = lf
+insert_final_newline = true
+indent_style = space
+trim_trailing_whitespace = true
+
+[*.rs]
+indent_size = 4
+
+[*.{rb,erb}]
+indent_size = 2
+
+[*.{md,markdown}]
+trim_trailing_whitespace = false
+
+[*.sh]
+end_of_line = lf
+indent_size = 2
+
+[*.{h,c,cc,cpp}]
+indent_size = 2
+
+[Makefile]
+indent_style = tab
+indent_size = 8
+
+[*.make]
+indent_style = tab
+indent_size = 8
+
+[*.diff]
+trim_trailing_whitespace = false
+
+[*.json]
+indent_size = 2
+
+[*.{js,jsx}]
+indent_size = 2
+
+[*.{ts,tsx}]
+indent_size = 2
+
+[*.{htm,html}]
+indent_size = 2
+
+[*.{css,sass,scss,less}]
+indent_size = 2
+
+[*.svg]
+indent_size = 2
+
+[*.toml]
+indent_size = 4
+
+[*.xml]
+indent_size = 2
+
+[*.{yml,yaml}]
+indent_size = 2
+
+[Dockerfile]
+indent_size = 4
+
+# Ignore paths
+[**/{node_modules,target,vendor}/**]
+charset = unset
+end_of_line = unset
+insert_final_newline = unset
+indent_size = unset
+indent_style = unset
+trim_trailing_whitespace = unset