Add .editorconfig to follow coding standards style

.editorconfig

@@ -0,0 +1,33 @@
+# this should work for all editors that support .editorconfig!
+#
+# on debian, emacs users should install elpa-editorconfig and vim
+# users should install vim-editorconfig.
+
+root = true
+
+[*]
+indent_style = space
+# this remove final newline in some editors, instead of inserting it
+# insert_final_newline = true
+trim_trailing_whitespace = true
+end_of_line = lf
+charset = utf-8
+max_line_length = 79
+
+[*.py]
+indent_size = 4
+# to do not have final newline in python code
+insert_final_newline = true
+
+[*.c, *.h]
+# done in tests and other cases do not use 2 spaces identations, so this
+# should be commented on those cases
+indent_size = 2
+trim_trailing_whitespace = true
+
+[Makefile, *.am]
+indent_style = tab
+
+[*-spec.txt]
+# specs seem to have 76 chars max per lines as RFCs
+max_line_length = 76