Work on documentation for build.py, also add checkout step.

README.md

@@ -1,50 +1,9 @@
 
 LINUX INSTRUCTIONS:
 
-Warnings:
-    - Do NOT follow the installation instructions for Unreal!
-    - Follow these instructions instead.
+All the important instructions are in 'build.py'
 
-Install important Software
-    - install git-lfs support.  Usually: apt-get install git-lfs
-    - install visual studio code.  Usually: apt-get install code  
-    - install dotnet6.  Usually: apt-get install dotnet6
-    - install clangd-15.  Usually: apt-get install clangd-15
-    - install jq.  On Linux, this is usually already installed.
-    - install python3.  On Linux, this is usually already installed.
 
-Git Clone the UnrealEngine repository:  
-    - The repository is at https://github.com/EpicGames/UnrealEngine.git  
-    - Cloning the repository requires creating an account and a password and  
-      some other fiddly credential management stuff I don't remember how to do.  
-    - Clone it into your home directory, $HOME/UnrealEngine  
-    - Check out the correct version: git checkout 5.3.1-release
- 
-Git Clone the integration Repository  
-    - The repository is at https://www.gnaut.com/team/integration.git  
-    - Clone it into your home directory, $HOME/integration  
-
-Apply patches and build everything:
-    - Change directory to $HOME/integration
-    - python3 build-everything.py
-
-Launch Integration in the Debugger  
-    - Change directory to $HOME/integration  
-    - Start the IDE: code Integration.code-workspace  
-    - Wait until a popup appears about 'recommended extensions'  
-    - Install the recommended extensions (only have to do this once)  
-    - Click 'Run/Start Debugging'  
-    - Is is preconfigured to launch and debug the unreal editor with the integration code.  
-
-To edit and recompile, from inside the IDE:  
-    - Edit some source files  
-    - Click 'Terminal/Run Task...'  
-    - If you edited the code in 'Source': Click 'IntegrationEditor Linux DebugGame Build'  
-    - If you edited the code in 'Luprex': Click 'build luprex'  
-    - Alternately, you can recompile from the command line by typing 'make' again.  
-    - After recompiling in the IDE, you can go straight back to debugging.  
-  
-