Make a directory of sample_addons.

These were additions suggested via email. I figured I'd use them first as

sample_addons/mstave.py

@@ -0,0 +1,67 @@
+import re, datetime
+from todo import usage, iter_todos, CONFIG, concat, _git_commit
+from todo import format_lines, PRIORITIES, prioritize_todo, print_x_of_y
+
+@usage('\tadd | a "Item to do +project @context #{yyyy-mm-dd}"',
+       concat(["\t\tAdds 'Item to do +project @context #{yyyy-mm-dd}'",
+       "to your todo.txt"], ' '), "\t\tfile.",
+       "\t\t+project, @context, #{yyyy-mm-dd} are optional\n")
+def add_todo(args):
+    """Add a new item to the list of things todo."""
+    if str(args) == args:
+        line = args
+    elif len(args) >= 1:
+        line = concat(args, " ")
+    else:
+        line = prompt("Add:")
+
+    prepend = CONFIG["PRE_DATE"]
+    l = len([1 for l in iter_todos()]) + 1
+    pri_re = re.compile('(\([A-X]\))')
+
+    if pri_re.match(line) and prepend:
+        line = pri_re.sub(concat(["\g<1>",
+            datetime.now().strftime(" %Y-%m-%d ")]), line)
+    elif prepend:
+        line = concat([datetime.now().strftime("%Y-%m-%d "), line])
+
+    with open(CONFIG["TODO_FILE"], "a") as fd:
+        fd.write(concat([line, "\n"]))
+
+    s = "TODO: '{0}' added on line {1}.".format(line, l)
+    print(s)
+    if CONFIG["USE_GIT"]:
+        _git_commit([CONFIG["TODO_FILE"]], s)
+    return l
+
+
+@usage('\tsl', "\t\tList items in your todo.txt in reverse priority\n")
+def rev_list():
+    """List items in reverse order so for long lists, the most important stuff
+    won't scroll off the top of the screen."""
+
+    formatted = format_lines()
+    lines = []
+    for p in PRIORITIES[::-1]:
+        lines.extend(formatted[p])
+
+    if lines:
+        print(concat(lines)[:-1])
+    print_x_of_y(lines, lines)
+
+
+@usage('\taddp | ap priority Item to be added', 
+        '\t\tAdds "Item to be added" with priority "priority" to your todo list.\n')
+def addp(args):
+    """Add an item and then prioritize it."""
+    pri = args.pop(0)
+    prioritize_todo([str(add_todo(args)), pri])
+# If someone did ./todo.py addp c Test addp foo bar bogus the output would be
+# TODO: 'Test addp foo bar bogus' added on line 9.
+# TODO: Item 9 changed from 'Test addp foo bar bogus' to '(C) Test addp foo bar bogus'.
+
+commands = { 'addp' : (True, addp),
+             'ap'   : (True, addp),
+             'sl'   : (False, rev_list),
+             'add'  : (True, add),
+             'a'    : (True, add) }