Moved to debian package structure for easy building.

We can now simply do:
$ fakeroot dpkg-deb --build liblouis-data-mh
$ lintian liblouis-data-mh.deb
$ sudo dpkg -i liblouis-data-mh.deb

new file:   .gitignore
new file:   liblouis-data-mh/DEBIAN/control
new file:   liblouis-data-mh/usr/share/doc/liblouis-data-mh/changelog.Debian.gz
new file:   liblouis-data-mh/usr/share/doc/liblouis-data-mh/changelog.gz
new file:   liblouis-data-mh/usr/share/doc/liblouis-data-mh/copyright
renamed:    mh-ar-g1.cti -> liblouis-data-mh/usr/share/liblouis/tables/mh-ar-g1.cti
renamed:    mh-ethio.cti -> liblouis-data-mh/usr/share/liblouis/tables/mh-ethio.cti
renamed:    mh-gr-comp8.cti -> liblouis-data-mh/usr/share/liblouis/tables/mh-gr-comp8.cti
renamed:    mh-mh-comp8.ctb -> liblouis-data-mh/usr/share/liblouis/tables/mh-mh-comp8.ctb
renamed:    mh-ne.cti -> liblouis-data-mh/usr/share/liblouis/tables/mh-ne.cti
renamed:    mh-sym.cti -> liblouis-data-mh/usr/share/liblouis/tables/mh-sym.cti
renamed:    mh-ta-g1.cti -> liblouis-data-mh/usr/share/liblouis/tables/mh-ta-g1.cti
bump version.