Pygment finds todo

@p4r4digm Please review.

Features:
* Added a bunch of test files. Some of them have a `TODO` in them.
* `findTodo.py` provides the `walk()` function, that will `os.walk` a directory and find all instances of comments with `TODO` in them.  It will returns a list of dictionaries, where the structure is:
```
[
  {
    'filename': '/target.py',
    'value': u'# TODO:  what1',
    'linenumber': 3
  },
  {
    'filename': '/target.py',
    'value': u'## TODO: what2',
    'linenumber': 5
    },
  {
    'filename': '/target.py',
     'value': u'## TODO: hmmm',
     'linenumber': 9
  },
  {
    'filename': '/test.adb',
    'value': u'--  TODO testing123\n',
    'linenumber': 3
  },
  {
    'filename': '/test.adb',
    'value': u'-- TODO testing123\n',
    'linenumber': 203},
  {
    'filename': '/test.asy',
    'value': u'// TODO testing123\n',
    'linenumber': 23},
  {
    'filename': '/test.awk',
    'value': u'# TODO testing123',
    'linenumber': 67},
  {
    'filename': '/testfolder/test.cs',
     'value': u'// TODO testing123\n',
     'linenumber': 29},
  {
    'filename': '/testfolder/test.cs',
    'value': u'/* TODO testing123 block */',
    'linenumber': 30
  }
]
```