Updated build instructions in readme

Author: lockie

README.org

@@ -5,26 +5,18 @@
 Just grab the build from [[https://github.com/lockie/lisp-jam-spring-2023/releases][releases section]].
 
 To run manually:
-+ Install SBCL and Quicklisp
-+ Copy the following libraries to your =local-projects= directory:
- #+begin_src bash
- cd ~/quicklisp/local-projects
- # cl-fast-ecs
- wget https://gitlab.com/lockie/cl-fast-ecs/-/archive/724a/cl-fast-ecs-724a.zip
- unzip cl-fast-ecs-724a.zip
- # cl-liballegro
- git clone https://github.com/resttime/cl-liballegro
- # cl-tiled
- git clone https://github.com/Zulu-Inuoe/cl-tiled
- #+end_src
-+ Link this project's folder to =local-projects= as well:
++ Install SBCL and CLPM
++ In the project directory, run
  #+begin_src bash
- cd lisp-jam-spring-2023
- ln -s `pwd` ~/quicklisp/local-projects/
+ clpm bundle install
+ clpm bundle exec sbcl
  #+end_src
-+ Run SBCL from =src= subdirectory and start the game:
++ In REPL started on previous step, run
  #+begin_src lisp
- (ql:quickload :thoughtbound)
+ (require 'asdf)
+ (asdf:load-system 'thoughtbound)
+ (uiop:chdir "Resources")
+ (setf *default-pathname-defaults* (truename "./Resources"))
  (thoughtbound:main)
  #+end_src