Started writing README

README.md

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-# Quark Kernel
+# Quark Kernel
+
+Quark Kernel is a hobbyist OS kernel mainly indended to be a challenging side-project.
+
+## Building
+
+You will need:
+- A cross-compiler
+- GNU Autotools
+
+To build the kernel for the x86 platform, run:
+- `autoreconf -i`
+- `./configure --host=i686-elf CFLAGS=-ffreestanding LDFLAGS=-nostdlib`
+- `make`
+
+To generate a bootable disk image, run:
+- `make quark.iso`
+
+So far this code has only been tested to compile using GCC. Some modifications might be necessary to build this project using other compilers. For a guide on building
+a cross-compiler, see the article on [osdev.org](https://wiki.osdev.org/GCC_Cross-Compiler).