Add Docset Feed, expand Install section in README

The docset feed will help with having updates to the XEP docset be
pulled in automatically by applications, and streamlines installation
thereof.

Makefile

@@ -10,6 +10,7 @@ REMOTE_URL  := https://xmpp.org/extensions
 ENVSUBST = $(call find-cmd,envsubst)
 SQLITE   = $(call find-cmd,sqlite3)
 TAR      = $(call find-cmd,tar)
+GIT      = $(call find-cmd,git)
 
 # Directory aliases.
 ROOTDIR    := $(dir $(realpath $(firstword $(MAKEFILE_LIST))))
@@ -24,6 +25,10 @@ VERBOSE :=
 ## Build and archive docset.
 build: $(BUILDDIR)$(NAME).tgz
 
+## Update XEPs in submodule.
+update:
+	$Q $(GIT) submodule update --remote --recursive
+
 ## Remove all temporary build files.
 clean:
 	$Q rm -Rf $(BUILDDIR)
@@ -48,7 +53,7 @@ $(CONTENTDIR)Resources/Documents/xep-%.html: $(XEPDIR)xep-%.xml | $(CONTENTDIR)R
 $(BUILDDIR)$(NAME).tgz: $(XEPS) $(CONTENTDIR)Info.plist
 	$Q $(TAR) --create --gzip --file $(BUILDDIR)$(NAME).tgz -C $(BUILDDIR) $(NAME).docset
 
-.PHONY: build clean
+.PHONY: build update clean
 
 # Conditional command echo control.
 Q := $(if $(VERBOSE),,@)

README.md

@@ -9,7 +9,7 @@ The source XEPs to be included in the resulting docset are pulled automatically
 able to build a useful doc-set, and you can do this like so:
 
 ```sh
-git submodule --remote --recursive
+git submodule update --remote --recursive
 ```
 
 Building the docset might fail if the above was not done and this repository wasn't cloned via `git
@@ -26,6 +26,18 @@ Building a new Docset requires a single command and a few dependencies:
 
 With these dependencies in place, you can just run `make` in the root directory of the repository.
 
+## Install
+
+You can install the resulting docset by either using the `build/XEPs.tgz` package directly, or,
+alternatively, by using the feed hosted here, the URL for which is:
+
+```
+https://raw.githubusercontent.com/deuill/xmpp-xep-dash-docset/trunk/XEPs.xml
+```
+
+Copying this into your application of choice (Dash, Zeal, etc.) should automatically pull in any
+future updates to the docset.
+
 ## License
 
 All code in this repository is covered by the terms of the MIT License, the full text of which can

XEPs.xml

@@ -0,0 +1,4 @@
+<entry>
+  <version>2024.1.0</version>
+  <url>https://github.com/deuill/xmpp-xep-dash-docset/releases/latest/download/XEPs.tgz</url>
+</entry>

xeps

@@ -1 +1 @@
-Subproject commit f86bc85bc677c1e668e251ba82bbca4953e8023b
+Subproject commit caa1e57fc0a84a16e77ecb0c9e0c78d100516e5f