Auto merge of #94 - matthiasbeyer:add-editorconfig, r=matthiasbeyer

Add editorconfig configuration file

Adds a configuration file for editorconfig, which I encourage you all to use when submitting PRs to this project 😄.

.editorconfig

@@ -0,0 +1,35 @@
+[*]
+end_of_line = lf
+insert_final_newline = true
+trim_trailing_whitespace = true
+charset = utf-8
+
+[*.rs]
+indent_style = space
+indent_size = 4
+
+# line length is only supported with vim and emacs
+max_line_length = 100
+
+[Makefile]
+# Tab indentation for Makefiles
+indent_style = tab
+tab_width = 4
+
+# line length is only supported with vim and emacs
+max_line_length = 80
+
+[*.html]
+indent_style = space
+indent_size = 4
+
+# line length is only supported with vim and emacs
+max_line_length = 80
+
+[*.{md,yaml,yml,nix}]
+indent_style = space
+indent_size = 2
+
+# line length is only supported with vim and emacs
+max_line_length = 80
+