Added more specifications

CONTRIBUTING.md

@@ -6,4 +6,14 @@ If you have any ideas for things we should include, please use ONE of the follow
 * Create an issue in the project (with links, and we'll parse and incorporate them)
 * Email `[email protected]` or `[email protected]` with content to add
 
-Significant effort is made to give attribution for these lists whenever possible, and if you are a list owner or know who the original author/curator is, please let us know so we can give proper credit.
+Significant effort SHOULD be made to give attribution for these lists whenever possible, and if you are a list owner or know who the original author/curator is, please let us know so we can give proper credit.
+
+## Folder naming scheme
+
+Folders should be named with the train case scheme, for example `File-System`.
+
+## READMEs
+
+`README.md` should ideally be written whenever needed. For example, if you are adding folders into SecLists you should add a readme into the folder to describe the contents.
+
+You can use the folder [PHP-Hashes](Passwords/PHP-Hashes/) as a reference.