extras: Update README & reflow

Update README to contain information about the Dockerfile and
re-wrapped to 80 characters.

1 files changed, 16 insertions, 8 deletions

diff --git a/extras/README b/extras/README
index 9dbb3499..9ae2433a 100644
--- a/extras/README
+++ b/extras/README
@@ -1,12 +1,20 @@
-This directory is intended for miscellaneous extra stuff that may be useful while developing
-Workload Automation. It should *NOT* contain anything necessary for *using* workload automation.
-Whenever you add something to this directory, please also add a short description of what it is in
-this file.
+This directory is intended for miscellaneous extra stuff that may be
+useful while developing Workload Automation. It should *NOT* contain
+anything necessary for *using* workload automation.  Whenever you add
+something to this directory, please also add a short description of
+what it is in this file.
+
+Dockerfile
+        Docker file for generating a Docker image containing WA,
+        devlib, and the required parts of the Android SDK. This can be
+        run in a container to avoid configuring WA on the host. Should
+        work "out of the box".
 
 pylintrc 
-        pylint configuration file set up for WA development (see comment at the top of the file
-        for how to use).
+        pylint configuration file set up for WA development (see
+        comment at the top of the file for how to use).
 
 walog.vim
-        Vim syntax file for WA logs; adds highlighting similar to what comes out
-        in the console. See comment in the file for how to enable it.
+        Vim syntax file for WA logs; adds highlighting similar to what
+        comes out in the console. See comment in the file for how to
+        enable it.