Add installation instructions

README.md

 #Extension providing a grid layout for Awesomewm 4.3
+
+
+## Installation
+
+Clone this repo, for ease of use in the same folder where `rc.lua` is.
+
+Add something like 
+
+``` lua
+-- Include taggrid, a mxn grid of tags
+taggrid = require("taggrid.taggrid")
+taggridkeys = require("taggrid.taggridkeys")
+```
+
+Below the awesome libraries but nearby the top of `rc.lua`.
+
+
+Comment and replace `awful.tag()` like this:
+
+``` lua
+-- Each screen has its own tag table.
+--awful.tag({ "1", "2", "3", "4", "5", "6", "7", "8", "9" }, s, awful.layout.layouts[1])
+
+-- Replace the tag setup with the one provided from taggrid
+awful.tag(taggrid.tags, s, awful.layout.layouts[1])
+```
+
+And provide the `gridlayout` for the `taglist`:
+``` lua
+-- Create a taglist widget
+-- using the gridlayout from taggrid
+s.mytaglist = awful.widget.taglist{
+  screen = s,
+  filter = awful.widget.taglist.filter.all,
+  buttons = taglist_buttons,
+  layout = taggrid.gridlayout
+}
+```
+
+## Keybindings
+
+Most of the keybindings will be imported from `taggridkeys` but `viewprev` and  `viewnext`
+will be changed in-place.
+
+Change to the following if wrapping around on the same row is desirable:
+``` lua
+    awful.key({ modkey,           }, "Left",  taggrid.viewprev, --awful.tag.viewprev
+              {description = "view previous", group = "tag"}),
+    awful.key({ modkey,           }, "Right",  taggrid.viewnext, --awful.tag.viewnext
+              {description = "view next", group = "tag"}),
+```
+
+The last modification is to fully replace the number key bindings:
+
+``` lua
+
+-- Replaced by taggrid
+
+-- @DOC_NUMBER_KEYBINDINGS@
+-- Bind all key numbers to tags.
+-- Be careful: we use keycodes to make it work on any keyboard layout.
+-- This should map on the top row of your keyboard, usually 1 to 9.
+--for i = 1, 9 do
+    --globalkeys = gears.table.join(globalkeys,
+        ---- View tag only.
+        --awful.key({ modkey }, "#" .. i + 9,
+                  --function ()
+                        --local screen = awful.screen.focused()
+                        --local tag = screen.tags[i]
+                        --if tag then
+                           --tag:view_only()
+                        --end
+                  --end,
+                  --{description = "view tag #"..i, group = "tag"}),
+        ---- Toggle tag display.
+        --awful.key({ modkey, "Control" }, "#" .. i + 9,
+                  --function ()
+                      --local screen = awful.screen.focused()
+                      --local tag = screen.tags[i]
+                      --if tag then
+                         --awful.tag.viewtoggle(tag)
+                      --end
+                  --end,
+                  --{description = "toggle tag #" .. i, group = "tag"}),
+        ---- Move client to tag.
+        --awful.key({ modkey, "Shift" }, "#" .. i + 9,
+                  --function ()
+                      --if client.focus then
+                          --local tag = client.focus.screen.tags[i]
+                          --if tag then
+                              --client.focus:move_to_tag(tag)
+                          --end
+                     --end
+                  --end,
+                  --{description = "move focused client to tag #"..i, group = "tag"}),
+        ---- Toggle tag on focused client.
+        --awful.key({ modkey, "Control", "Shift" }, "#" .. i + 9,
+                  --function ()
+                      --if client.focus then
+                          --local tag = client.focus.screen.tags[i]
+                          --if tag then
+                              --client.focus:toggle_tag(tag)
+                          --end
+                      --end
+                  --end,
+                  --{description = "toggle focused client on tag #" .. i, group = "tag"})
+    --)
+--end
+
+-- Setup taggridkeys, keybindings for the mxn grid of tags
+globalkeys = taggridkeys(globalkeys)
+```
+
+## Styling/looks
+
+To make the numbers fit the tags modify your theme with:
+
+``` lua
+theme.taglist_font                  = "Terminus 4"
+```
+