Add some additional details on note types to the readme.

README.md

@@ -187,7 +187,7 @@ Both wiki-style `![[something.png]]` and `![markdown](style.png)` asset embeddin
 
 Yanki automatically infers the _type_ of Note you'd like to create in Anki based on the presence or absence of certain element in your Markdown notes.
 
-The rules were designed with Markdown's semantic precedents and visual nature in mind.
+The rules were designed with Markdown's semantic precedents and visual nature in mind, and are based on the note types that are included as defaults in a fresh installation of Anki. Yanki creates and manages the required note types automatically. Do not create or edit them manually.
 
 The most minimal examples to "trigger" different note types are shown below, but the implementation can handle additional weirdness and will generally do the right thing if it encounters elements that might indicate conflicting note types.
 
@@ -207,7 +207,7 @@ This is the front of the card
 This is the back of the card
 ```
 
-### Basic (and reversed card)
+### Basic (and reversed card with extra)
 
 Doubling up the `---` identifies the note as being **reversible** (and will result in the generation of two cards in Anki).