Update README.md

Author: nvander1

README.md

@@ -1 +1,55 @@
-# python-grammar-hacks
+# Hacking Python's grammar
+
+## Getting the source
+
+Download the source with git,
+
+    git clone https://github.com/python/cpython.git
+    
+or you can download a [zip file](https://github.com/python/cpython/archive/master.zip).
+
+## Compiling
+
+### Windows
+    PCbuild\build.bat -e -d
+
+### macOS and Linux
+Generate the Makefile with
+
+    ./configure 
+
+Then we can build Python.
+
+    make
+
+#### Compiling with ccache (optional)
+
+If we're compiling on macOS or Linux, we can speed things up with ccache. Compiling with ccache lets us only compile files that have changed so that we don't have to recompile the entire project because one file changed.
+
+##### Ubuntu
+    sudo apt-get install ccache
+
+##### Arch Linux
+    pacman -S ccache
+    
+##### macOS (requires Homebrew)
+
+    brew install ccache
+
+To use ccache when we compile Python, we just have to make two changes to the Makefile.
+We need to replace the following lines
+
+    CC=   gcc -pthread
+    CXX=  g++ -pthread
+
+with the following.
+
+    CC=   ccache gcc -pthread
+    CXX=  ccache g++ -pthread
+
+Now everytime running `make` after the first, the compilation will be much quicker.
+
+## Our first change
+In Python, we have to `import` modules before we can use them,
+
+but we've decided we don't like the word `import` and want to `require` modules instead.