Added stub class for IPython notebook conversion to documentation/library/writers.py.

git-svn-id: http://music21.googlecode.com/svn/trunk@3472 5c16147e-a200-11de-b0cc-ab0ad15e60d0
Added new codebase-examining script to documentation/scripts/:

    - find-docstrings-without-leading-newline

As of this commit, it finds 1588 docstrings without leading newlines.


git-svn-id: http://music21.googlecode.com/svn/trunk@3473 5c16147e-a200-11de-b0cc-ab0ad15e60d0
Added new script to documentation/scripts/:

    - find-docstrings-with-unindented-code-blocks

As of this commit, the script finds 2001 docstrings with unindented code blocks.


git-svn-id: http://music21.googlecode.com/svn/trunk@3474 5c16147e-a200-11de-b0cc-ab0ad15e60d0