Add EditorConfig settings for project filetypes

Author: alerque

.editorconfig

@@ -0,0 +1,17 @@
+root = true
+
+[*]
+end_of_line = lf
+insert_final_newline = true
+
+[{*.lua,*.rockspec}]
+indent_style = space
+indent_size = 2
+
+[*.ftl]
+indent_style = space
+indent_size = 4
+
+[*.json]
+indent_style = space
+indent_size = 2