Added some readme content.

Author: pcummuskey

README.adoc

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+Git Script Manager
+==================
+:author: Peter Cummuskey
+:email: peterc@aetheric.co.nz
+
+This utility will allow you to manage your git scripts in a less-than-horrible
+fashion. 
+
+== Commands
+
+There are a few commands for dealing with the repos and symlinks.
+
+=== get
+
+Fetches, updates, and/or checks-out a branch of a provided github repository.
+
+e.g. git scripts get tzrlk/git-extras master
+
+NOTE: If the last argument is omitted, it will default to 'master'
+
+TODO: Remove reliance on github.
+
+=== on
+
+Selects a particular script and symlinks it into the ~/.git/script-bin
+directory for use.
+
+e.g. git scripts on tzrlk/git-extras bin/git-ignore git-ignore
+
+TODO: Make the last argument optional
+
+TODO: Automatically 'get' repo if not alread fetched (only with option)
+
+TODO: Add recursive searching for scripts so the subdir doesn't need to be
+specified.
+
+=== off
+
+Removes a particular script from use.
+
+e.g. git scripts off git-ignore
+
+=== purge
+
+Removes a script repo and all associated activated scripts.
+
+e.g. git scripts purge tzrlk/git-extras
+
+TODO: Make this more than an rm -rf on the repo dir. Should clean-up symlinks.
+
+=== list
+
+Lists all the script repos, their scripts, and whether they are activated or
+not.
+
+e.g. git scripts list
+
+TODO: Actually add recursive script search and matching. Ugh.
+
+== Installation
+
+Scripts are provided for installation, but for any environment, the first step
+is to clone this repository to some directory on your computer.
+
+=== Windows
+
+Execute install.cmd and it will use powershell to create the correct PATH
+entries for you.
+
+NOTE: This doesn't actually work at the moment, so you'll need to start a
+powershell session under administrator mode, and set the ExecutionPolicy to
+Bypass; finally, run the script file. The install.cmd file just attempts to do
+this all for you. 
+
+=== Linux
+
+I haven't written the install scripts for linux yet.
+
+=== Manual
+
+Just add the bin directory and ~/.git/script-bin to your PATH. That's it.
+