Fix note issues

Fix the following issues in note
1.  Always use a combo of lowercase letters, hyphen, underscore and
    numbers for the file name. This is taken from the title and uses sed
    to translate the uppercase letters to lowercase. Unfortunately,
    sed's translation mode doesn't support ranges, so we must use the
    full alphabet.
2.  Add support for displaying version information.
3.  Reformat the help display so it all fits in a single line.
4.  Add checking to ensure that at least one argument is passed to note
    so that the parse_args routine doesn't barf an error with shift.
5.  Remove argument checking in notes_init. It's called only by the init
    function, so there's no need to add a flag to control warnings.

note

@@ -1,6 +1,7 @@
-#!/bin/sh
-# Note taking script
+#!/bin/bash
+# Notes manager for the command line
 
+NOTES_VER="0.1a"
 NOTES_DIR="$HOME/.notes"
 
 # Initialize with the default editor
@@ -17,12 +18,13 @@ notes_init() {
 
         git init .
     else
-        [ ! -z $1 ] && echo "Notes has already been initialized."
+        echo "Notes has already been initialized."
     fi
 }
 
 make_title() {
-    echo "$*" | sed 's/[^A-Za-z0-9_-]\+/-/g'
+    echo "$*" | sed 's/[^A-Za-z0-9_-]\+/-/g' | \
+    sed 'y/ABCDEFGHIJKLMNOPQRSTUVWXYZ/abcdefghijklmnopqrstuvwxyz/'
 }
 
 title_to_name() {
@@ -65,8 +67,8 @@ check_dir() {
 
 help_cmd() {
     echo '
-Note taker for the Command Line
-===============================
+Notes Manager for the Command Line
+==================================
 
 This is a bash script that lets you take notes which are maintained in a
 Git repository. You can run this script by typing the following command
@@ -78,17 +80,22 @@ Commands
 --------
 
     Command     Usage
+    -------     -----
     new         Follow this with the note name to create a new note
-    edit            Follow this with the note name to edit an existing
-                    note
+    edit        Follow this with the note name to edit an existing note
     delete      Follow this with the note name to delete a note
     list        Prints the list of available notes
-    hist            Displays the note history
+    history     Displays the note history
     init        Run this the very first time to set up the folders
     help        Prints this help message
+    version     Prints the version information
 '
 }
 
+version_info() {
+    echo "Notes Manager version $NOTES_VER"
+}
+
 parse_args() {
     note_cmd=$1
     shift
@@ -191,7 +198,7 @@ parse_args() {
         ;;
     
     "init")
-        notes_init warn
+        notes_init
         ;;
     
     "list")
@@ -200,10 +207,20 @@ parse_args() {
         ls -1 $note_arg
         ;;
     
+    "ver" | "version")
+        version_info
+        ;;
+
     *)
         echo "Unrecognized command '$note_cmd'. Use help."
         ;;
     esac
 }
 
+if [[ $# -lt 1 ]]
+then
+    echo "Usage: note <command> <arguments>"
+    echo "Type 'note help' for detailed help"
+else
     parse_args $*
+fi