Added first version of the project documentation. Inside docs/src there is
the sphinx  project we use to manage the docs. Inside docs/html there is
a copy of the docs in html format.
Fixed some typos in the INSTALL file
Added two new parameters to the postman.conf file (both the example config
file inside conf/ and the one used for testing in postman/tests/). These
parameters do nothing yet (they are related to ssl stuff) but we do talk
about them in the docs.
Added a new method to the XMLRPC list of methods related to members.