Findup

- findup.glob() now returns the path of the first pattern matched by
glob.glob() in the current working directory (or a given dir) or the
nearest ancestor dir. Version 0.2.0 returned the directory containing
the path. In keeping with `node-findup-sync` this returns the matching
path itself.
- change parameter name from `cwd` to `dirname` in findup.glob()
- remove unused parameter in `walkup` function.
- Change exception raised when `dirname` is not a directory to the more
specific `ValueError`.

- findup.glob() now conforms to its documentation, by returning the directory
containing the path that the glob pattern matches instead of the path itself.
- Argh! How embarrassing! This package could not be installed with pip,
because it was missing the MANIFEST.in file that included the README.md file
that setup.py uses. This is now fixed, so `pip install findup` works.