added some substance to the README

README.md

@@ -0,0 +1,55 @@
+If you want to split subdirectories into a git submodule (or the other way around) while maintaining history of commits, you've come to the right spot.
+
+:-D
+
+Installation
+===
+
+    git clone https://github.com/apenwarr/git-subtree.git
+
+    cd git-subtree
+    sudo rsync -a ./git-subtree.sh /usr/local/bin/git-subtree
+
+Or if you want the man pages and all
+
+    make doc
+    make install
+
+Usage
+===
+
+Split a larger into smaller chunks:
+
+    # Go into the project root
+    cd ~/my-project
+
+    # Create a branch which only contains commits for the children of 'foo'
+    git subtree split --prefix=foo --branch=foo-only
+
+    # Remove 'foo' from the project
+    git rm -rf ./foo
+
+    # Create a git repo for 'foo' (assuming we already created it on github)
+    mkdir foo
+    pushd foo
+    git init
+    git remote add origin [email protected]:my-user/new-project.git
+    git pull ../ foo-only
+    git push origin -u master
+    popd
+
+    # Add 'foo' as a git submodule to `my-project`
+    git submodule add [email protected]:my-user/new-project.git foo
+
+For detailed documentation (man page), please read `git-subtree.txt`.
+
+Contact
+===
+
+Please don't contact me using github mail; it's slow, ugly, and worst of
+all, redundant.
+
+Email me instead at [[email protected]]([email protected]) and I'll be happy to
+help.
+
+Avery