docs: update README/NEWS.

NEWS.org

@@ -33,15 +33,15 @@
 
     - /experimental/: if you build ~mu~ with [[https://github.com/CLD2Owners/cld2][CLD2]] support (available in many Linux
       distros), ~mu~ will try to detect the language of the body of e-mail
-      messages; you can then search by their ISO-639-1 code, e.g. ~mu find
+      messages; you can then search by their ISO-639-1 code, e.g.:
-      lang:en~
+ ~$ mu find lang:en~
 
-    - set the default database batch-size (the ~--batch-size~ parameter to ~mu
+    - set the default database batch-size to the ~mu init~ command) to 50000
-      init~) to 50000 rather than 250000; the latter was too high for systems
+      rather than 250000; the latter was too high for systems with limited
-      with limited memory.
+      memory. You can of course change that with ~--batch-size=...~
 
-    - restore expansion for "~--option=~/foo~" type options for shells that don't
+    - restore expansion for path options such as ~--maildir=~/Maildir~ for shells
-      do that, such as Bash.
+      that don't do that, such as Bash.
 
 *** mu4e
 

README.org

@@ -18,7 +18,9 @@
 
 Welcome to ~mu~!
 
-Given the enormous amounts of e-mail many people gather and the importance of
+Latest development news: [[NEWS.org]].
+
+With the enormous amounts of e-mail many people gather and the importance of
 e-mail message in our work-flows, it's essential to quickly deal with all that
 mail - in particular, to instantly find that one important e-mail you need right
 now, and quickly file away message for later use.