Copying libtabula

The libtabula source code and the reference manual derived from comments in the library source code are licensed under the GNU Lesser General Public License.

The libtabula User Manual is licensed under a unique license derived from the Linux Documentation Project License.

(The changes are due to the fact that the User Manual isn't actually part of TLDP, so a lot of the language in their license doesn't make sense when applied to the libtabula user manual.)