Merge pull request yadm-dev#38 from ParaplegicRacehorse/patch-1

_docs/020_install.md

@@ -69,10 +69,60 @@ yaourt -S yadm
 emerge -atv app-admin/yadm
 ```
 
-## Other
+## Download
 
 You *can* simply download the **yadm** script and put it into your `$PATH`. Something like this:
 
 ```
 curl -fLo /usr/local/bin/yadm https://github.com/TheLocehiliosan/yadm/raw/master/yadm && chmod a+x /usr/local/bin/yadm
 ```
+
+Of course, you can change the file paths above to be appropriate for your `$PATH` and situation.
+
+## Clone
+
+You might wish to clone the **yadm** project and symlink `yadm` into your
+`$PATH`.
+
+```
+git clone https://github.com/TheLocehiliosan/yadm.git ~/.yadm-project
+ln -s ~/.yadm-project/yadm ~/bin/yadm
+```
+
+Now you can pull the latest updates to **yadm** using Git. Again, adjust the
+file paths above to be appropriate for your `$PATH` and situation.
+
+## Submodule
+
+If you are comfortable with how Git submodules  work, another option is to add
+the **yadm** project as a submodule and symlink `yadm` into your `$PATH`.
+
+```
+cd ~
+yadm submodule add https://github.com/TheLocehiliosan/yadm.git .yadm-project
+yadm submodule update --init --recursive
+ln -s ~/.yadm-project/yadm ~/bin/yadm
+yadm add .yadm-project .gitmodules bin/yadm
+yadm commit
+```
+When using submodules, you need to initialize them each time you do a fresh
+`clone` of your dotfiles.
+
+```
+yadm submodule update --init --recursive
+```
+
+Updating to a newer version of **yadm** would use commands similar to this.
+
+```
+cd ~/.yadm-project
+git pull
+yadm add ~/.yadm-project
+yadm commit
+```
+
+Again, adjust the file paths above to be appropriate for your `$PATH` and
+situation.
+
+You can find more information about Git submodules by reading the [git-submodule](https://git-scm.com/docs/git-submodule)
+man page.