GitLab

 - patch contributed by David Carlier (thanks!)
 - updated to current master
 - fixed compliation issues
 - written developer's guide (pgsql setup steps)
 - many smaller changes
 - still WIP

Also, included FQDN fields in the MySQL script creating database.

SQL statement.  This corrects a MySQL flush timing issue that causes
the checkVersion unit test to fail under some Debian VMs.

When the MySql lease manager tests create the database, they now also
create all the indexes as well.

Including:
* Updates to comments etc.
* Addition of Lease4::operator==() (and associated unit tests)

* Corrections of miscellaneous typos in comments
* Update database version to 1.0
* Handling of truncation while fetching data from the database

Make the names of the columns consistent between the lease4 and
lease6 tables.

The unit tests now create the schema before each test and destroy
it afterwards.  This will be more flexible than needing to update
the schema on test machines each time.  The drawback is the need
to keep the database creation script in step with the hardcoded
set of SQL statements in the test program.