README: Add Git-less installation instructions

Closes #35.

README.md

@@ -2,16 +2,12 @@
 
 ## Installation
 
+### Using Git and the bootstrap script
+
 ```bash
 git clone https://github.com/mathiasbynens/dotfiles.git && cd dotfiles && ./bootstrap.sh
 ```
 
-When setting up a new Mac, you may want to set some sensible OS X defaults:
-
-```bash
-./.osx
-```
-
 To update, `cd` into your local `dotfiles` repository and then:
 
 ```bash
@@ -24,10 +20,31 @@ Alternatively, to update while avoiding the confirmation prompt:
 ./bootstrap.sh -f
 ```
 
+### Git-free install
+
+To install these dotfiles without Git:
+
+```bash
+cd; curl -#L https://github.com/mathiasbynens/dotfiles/tarball/master | tar -x --strip-components 1 --exclude={README.md,bootstrap.sh}
+```
+
+To update later on, just run that command again.
+
+### Sensible OS X defaults
+
+When setting up a new Mac, you may want to set some sensible OS X defaults:
+
+```bash
+./.osx
+```
+
+## Feedback
+
 Suggestions/improvements
 [welcome](https://github.com/mathiasbynens/dotfiles/issues)!
 
 ## Thanks to…
+
 * [Gianni Chiappetta](http://gf3.ca/) for sharing his [amazing collection of dotfiles](https://github.com/gf3/dotfiles)
 * [Matijs Brinkhuis](http://hotfusion.nl/) and his [homedir repository](https://github.com/matijs/homedir)
 * [Jan Moesen](http://jan.moesen.nu/) and his [ancient `.bash_profile`](https://gist.github.com/1156154) + [shiny tilde repository](https://github.com/janmoesen/tilde)