Update the tutorial.

Main page has more general info.

Added info on NumPy memory order.

Added back links to tutorial sub-pages.

Author: HexDecimal

tutorials/python/2021/distribution.md

@@ -324,3 +324,5 @@ That's the end of the explanation on automated builds.
 Keep in mind that this doesn't check that executables actually run, and no other tests are run other than checking that the build succeeds.
 
 {% endraw %}
+
+[Return to the hub](.).

tutorials/python/2021/index.md

@@ -1,11 +1,32 @@
 ---
-title: "Yet Another Roguelike Tutorial 2021 - Written in Python 3 and python-tcod"
 ---
+# Another Roguelike Tutorial 2021
 
-#### Main Tutorial:
+This tutorial was made as a 2021 update to [RoguelikeDev Does The Complete Roguelike Tutorial](https://old.reddit.com/r/roguelikedev/wiki/python_tutorial_series).
+This version was designed for [Python](https://www.python.org/) 3.8+.
+
+If you are following the tutorial and run into issues then you can ask for help on [Reddit at /r/roguelikedev](https://old.reddit.com/r/roguelikedev/) or on the [Discord #roguelikedev-help channel](https://discord.gg/jEgZtqB).
+
+The event is still ongoing.
+It isn't unusual for tcod to be updated during the event, so you might have to upgrade it has you progress on this version of the tutorial.
+Earlier pages may also be updated at times.
+
+## Main Tutorial:
 
   - [Part 0 - Setting Up](part-0)
   - [Part 1 - Drawing the ‘@’ symbol and moving it around](part-1)
+  - Part 2 - The generic Entity, the render functions, and the map (July 6th)
+  - Part 3 - Generating a dungeon
+  - Part 4 - Field of view (July 13th)
+  - Part 5 - Placing enemies and kicking them (harmlessly)
+  - Part 6 - Doing (and taking) some damage (July 20th)
+  - Part 7 - Creating the Interface
+  - Part 8 - Items and Inventory (July 27th)
+  - Part 9 - Ranged Scrolls and Targeting
+  - Part 10 - Saving and loading (August 3rd)
+  - Part 11 - Delving into the Dungeon
+  - Part 12 - Increasing Difficulty (August 10th)
+  - Part 13 - Gearing up
 
-#### Extras:
+## Extras:
   - [Distributing Python programs with PyInstaller](distribution)

tutorials/python/2021/part-0.md

@@ -100,3 +100,5 @@ There's a link there to the Discord channel as well.
 ## Ready to go?
 
 Once you're set up and ready to go, you can proceed to [Part 1](part-1).
+
+[Return to the hub](.).

tutorials/python/2021/part-1.md

@@ -211,6 +211,8 @@ Contexts must be closed once you're done with them, but the `with` statement wil
 
 Then a [tcod.Console](https://python-tcod.readthedocs.io/en/latest/tcod/console.html#tcod.console.Console) is created with the same size that was given to `tcod.context.new`,
 `order="F"` sets the console arrays to be indexed in `x, y` order.
+This is a convenient way to handle array indexes so we'll use `order="F"` a lot when working with NumPy.
+You might wonder why `order="F"` isn't the default [and there is an explanation for that](https://numpy.org/doc/stable/reference/internals.html#multidimensional-array-indexing-order-issues).
 These arrays are not being used yet.
 
 Now with `while True:` the game-loop begins, with the only way of existing this loop normally being the `SystemExit` exceptions implemented earlier.
@@ -229,3 +231,5 @@ It can then unpack its values and checks if the destination is in the bounds of
 You can see the current progress of this code in its entirety [here](https://github.com/TStand90/tcod_tutorial_v2/tree/2021/part-1).
 
 Part-2 isn't available yet, [but you can setup distribution in the meantime](distribution).
+
+[Return to the hub](.).