Update 'README.md'

Bring usage up-to-date.

README.md

@@ -6,14 +6,29 @@
 included in the flash filesystem of an embedded device. This query applet 
 is intended for use in such limiting cases.
 
-```
-usqlite --help
-Usage: usqlite ["SQL command;" ...] [< SQL_script]
+```plain
+Usage: usqlite [OPTIONS] ["SQL command;" ...] [< SQL_script]
+
+Execute SQL commands on SQLite databases
+
+Options:
+  -C, --show-columns        Show column names (if any) as headers of 
+                            query results
+  -S,                       String to separate columns in query 
+  --column-separator=SEP    results (default "|")
+  -v, --verbose             Log details to stderr
+  -V, --version,            Print program version, licensing and  
+                            warranty details to stderr
+  --                        Subsequent parameters are not options
+  -h, --help, -?            Print this help to stderr and exit
+                                          
+To cancel reading from stdin in a POSIX shell, use the input 
+redirection "<&-".
 ```
 
 _u_ is an abbreviation for _micro_ popular in the typewriter era before it was
 easy to write the Greek letter μ (mu), or it could stand for _unplasticised_
-which would be equally valid as the Makefile avoids the `-fplasticise` compiler
+which would be equally valid as the `Makefile` avoids the `-fplasticise` compiler
 flag.
 
 This program is released subject to the GNU GENERAL PUBLIC LICENSE Version 3,