add readme

README.md

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+# subs [![Build Status](https://api.travis-ci.org/mitchweaver/subs.svg?branch=master)](https://travis-ci.com/mitchweaver/subs)
+
+Have a feed of your YouTube subscriptions.
+
+Select a choice and with dmenu and view with mpv.
+
+## About
+
+I'm a fan of command line and "doing things yourself". I also don't
+like having a Google account, but still want to keep track of
+subscriptions. Thus [subs](http://github.com/mitchweaver/subs) was born.
+
+![subs_dmenu](https://wvr.sh/u/tXCc.png)
+
+![subs_gen_link](https://wvr.sh/u/amv5.png)
+
+![subs_update](https://wvr.sh/u/Iic0.png)
+
+## Environment
+
+Create your `$SUBS_FILE`, as described below, and export this var its path.
+
+Next set your `$SUBS_MENU_PROG` if desired, by default the menu will be `dmenu -p Subs:`.
+
+## Usage
+
+First generate the links to the XML feeds of your subscriptions via `subs -g`.
+
+Once this has completed, this needn't be done again unless you update your `$SUBS_FILE`.
+
+Next, update your subs cache via `subs -u`. This will fetch any
+changes from the feeds and store it back into the cache locally.
+This way the cache only is updated when you choose to, rather than
+redownloading them all every run.
+
+## Subs File
+
+The `$SUBS_FILE` file is a normal text file containing usernames of your subscriptions.  
+These can be the username or the channel IDs.
+
+Comments and blank lines are ignored.  
+Here is a short example:
+
+```
+# Travel
+UCXulruMI7BHj3kGyosNa0jA # Indigo Traveller
+cmbroad44                # Abroad in Japan
+# Misc
+UCimiUgDLbi6P17BdaCZpVbg # exurb1a
+Vsauce                   # Vsauce
+UCF9cNYdVSYS_oha1eGzDTGQ # Goniloc
+```
+
+As you can see, some of these are usernames and some are channel IDs -- either work just fine.
+
+## Safety
+
+Every commit is [shellchecked](https://github.com/mitchweaver/subs/blob/master/.travis.yml) with travis with no cases ignored.

makefile

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+PREFIX = /usr/local
+NAME = subs
+
+all:
+	@>&2 echo "Use 'make install'"
+
+install:
+	install -D -m 0755 ${NAME} ${PREFIX}/bin/${NAME}
+
+uninstall:
+	rm ${PREFIX}/bin/${NAME}
+
+test:
+	shellcheck -s sh ${NAME}