Move contribution links to the index. Fix #48 and #54

Author: avivace

src/SUMMARY.md

@@ -1,6 +1,6 @@
 [Home](index.md)
 [Roadmap](roadmap.md)
-[Help and feedback](help-feedback.md)
+[Help](help-feedback.md)
 
 # Part Ⅰ — Hello World!
 

src/help-feedback.md

@@ -1,14 +1,8 @@
-# Help and feedback
+# Help
 
 If you are stuck in a certain part of the tutorial, want some advice, or just wish to chat with us, [the GBDev community chat](https://gbdev.io/chat) is the place to go!
-I actively participate there, and don't be afraid to ask questions!
+The authors actively participate there so don't be afraid to ask questions!
 (The "ASM" channel should be the most appropriate to discuss the tutorial, by the way.)
 
-If you are interested in contributing to or translating the tutorial, thank you!
-Follow the link above, I'd be happy to work with you.
-
-Noticed a problem with the tutorial?
-Please [check out our issue tracker](https://github.com/gbdev/gb-asm-tutorial/issues); if there is no open issue about your problem, please create a new one, or reach out to us via the link above.
-
-If you prefer email, my address is `tutorial@<domain>`, where you replace `<domain>` with this website's domain name (it ends with `.fr`).
+If you prefer email, you can reach us at `tutorial@<domain>`, where you replace `<domain>` with this website's domain name.
 Anti-spam measure, I hope you understand.

src/index.md

@@ -19,24 +19,31 @@ There are some handy icons near the top of your screen!
 - The brush <i class="fa fa-paint-brush"></i> allows selecting a different color theme;
 - The magnifying glass <i class="fa fa-search"></i> pops up a search bar;
 - The world icon <i class="fa fa-globe"></i> lets you change the language of the tutorial;
-- The printer <i class="fa fa-print"></i> gives a single-page version of the *entire* tutorial, which you can print if you want;
+- The printer <i class="fa fa-print"></i> gives a single-page version of the _entire_ tutorial, which you can print if you want;
 - The GitHub icon <i class="fa fa-github"></i> links to the tutorial's source repository;
 - The edit button <i class="fa fa-edit"></i> allows you to suggest changes to the tutorial, provided that you have a GitHub account.
 
 Additionally, there are arrows to the left and to the right of the page (they are at the bottom instead on mobile) to more easily navigate to the next page.
 
 With that said, you can get started by simply navigating to the following page :)
 
+## Contributing
+
+Feel free to send feedback or suggestions in the form of Issues on the [GitHub repository](https://github.com/gbdev/gb-asm-tutorial).
+We're also looking for help for writing new lessons and improving the existing ones! Feel free to send Pull Requests and go through the Issues to see what needs to be worked on.
+
+You can help translating the tutorial on [Crowdin](https://crowdin.com/project/gb-asm-tutorial).
+
 ## Licensing
 
 **In short**:
 
 - Code within the tutorial is essentially **public domain**, meaning that you are allowed to copy it freely without restrictions.
 - You are free to copy the tutorial's contents (prose, diagrams, etc.), modify them, and share that, but you must give credit and license any copies permissively.
-- This site's *source code* can be freely copied, but you must give a license and copyright notice.
+- This site's _source code_ can be freely copied, but you must give a license and copyright notice.
 
 **Full details**, please follow these links for more information on the respective licenses:
 
-- All the code contained within the tutorial itself is licensed under <a rel="license" href="http://creativecommons.org/publicdomain/zero/1.0/">CC0</a>. *To the extent possible under law, all copyright and related or neighboring rights to code presented within GB ASM Tutorial have been waived. This work is published from France.*
+- All the code contained within the tutorial itself is licensed under <a rel="license" href="http://creativecommons.org/publicdomain/zero/1.0/">CC0</a>. _To the extent possible under law, all copyright and related or neighboring rights to code presented within GB ASM Tutorial have been waived._
 - The contents (prose, images, etc.) of this tutorial are licensed under a <a rel="license" href="http://creativecommons.org/licenses/by-sa/4.0/">Creative Commons Attribution-ShareAlike 4.0 International License</a>.
 - Code used to display and format the site is licensed under the [MIT License](https://github.com/gbdev/gb-asm-tutorial/blob/master/LICENSE) unless otherwise specified.