DO NOT MODIFY THE LANGUAGE FILES, THEY WILL GET AUTOMATICALLY REPLACED BY THE TRANSLATION SYSTEM!
Use http://hee-translate.chylex.com/ for translations instead.
The project is under the All Rights Reserved license, which means that redistribution is forbidden. However, I do not want to be as restrictive, so here are some general rules, and some specific cases for what you may want to do with the source.
This rule only applies to the source code, assets are copyrighted and belong to their respective owners (music to qwertygiy, all other assets to me), and cannot be used in other projects without the owner's permission!
If you find a handy method or even an entire class (such as BlockReplaceHelper), I don't mind if you use it in your project (don't copy everything you see though, that's not how you learn to mod). Giving credit is only required if your project has publicly visible source, in that case use javadoc and link back to the original source.
It would be best to contact me first, because not everything can be added into the mod and I wouldn't want you to waste your time with a PR that will not get accepted.
When modifying the files, please try to follow my code formatting style. I don't autoformat because Eclipse doesn't let me customize the style exactly the way I want it, and for that reason I also cannot give you any preference file you could import.
I'm also a huge derp and don't really get how most of this Git thing works. Don't do anything big because if there's any problem accepting a PR, it will most likely not be accepted.
Keep in mind that addons depend on the parent mod, but don't contain any part of it - otherwise it's a modification!
You are welcome to create and distribute any addon. If you let me know about it, I might add it to a list of supported addons too. :)
The terms say that you cannot redistribute the mod or modifications of the mod. You can play around with the code if you fork the project, but if you want to distribute it, you need my explicit permission. I haven't been in this situation yet, so if you create a modification, let me know and we'll figure something out.
In order to setup your own workspace to play around with the source code, first clone this repository using your Git client (make sure to select the correct branch, they are named by Minecraft versions; master is always the latest work in progress version).
Once you cloned the repository, follow this tutorial on how to install Forge: http://www.minecraftforge.net/wiki/Installation/Source
When you download Forge, do not copy the src folder and build.gradle file, as those are provided by the mod's repository, otherwise your setup will not work.
This project also contains an issue tracker for the mod, which you should use for ideas, questions and bug reports.
Always provide as much information and details as possible. If you're reporting a bug or a crash, always provide logs (both crash and client/server log) and conditions under which the bug or crash happened!
Resolved issues will have a resolution in square brackets, optionally with HEE version.
Visit the issue tracker here: https://github.com/chylex/Hardcore-Ender-Expansion/issues