0.9.1

• Added some basic instructions to compile the kernel and run it with QEMU (README.md).
• Created a script to automate the process of configuring the system to build and run LibertyOS (bootstrap.sh).
• Updated the version number (Cargo.toml).
• Updated the kernel version (src/main.rs).
• Created a file to keep track of people who are working on this project (doc/Contributors).
• Removed file (triplet)