Add NEWS file; update copyright notices.

We now only support Python 3.

Use Click instead of argparse to build the command-line interface.

Add missing copyright notice; apply PyDev style.

Ignore all files generated by the Eclipse IDE and its PyDev plugin.

Add the missing 'URL' key, fix incorrect package name (sharepoint
instead of davpoint), and fix typo in license qualifiers.

Install the executable script as 'davpoint' instead of
'mount.sharepoint'.

Update the README to quickly document the purpose of the tool, and
how to configure and use it.

Add basic docstrings to roughly explain the purpose of the public
modules and functions beyond the main script.

Move the assembly of the authentication header from the davfs2
module to the main module, so that the davfs2 module is uncoupled
from the SharePoint-specific header.

This is Davpoint, a wrapper for Davfs2 allowing to mount remote
SharePoint filesystems that require cookie-based authentication.