Load alignment algorithms dynamically

[Thomas Francart]

Because they are not. See

onagui/src/main/java/fr/onagui/control/AlignmentControler.java

Line 92 in 896db66

 // Pas mal générique, maintenant il faudrait que je charge ça à la volée... 

We can use a ServiceProvider mechanism : https://docs.oracle.com/javase/tutorial/sound/SPI-intro.html
Just like in RDF4J : http://docs.rdf4j.org/custom-sparql-functions/#_creating_an_spi_configuration

See also #15

[Thomas Francart]

The objective would be to integrate the INRIA alignAPI : http://alignapi.gforge.inria.fr/