Gregofacsimil + neumes from H + rsigns according to H.

Fixed melodic error in GFS on "eam". Critical melody http://www.omnigreg.at/wiki/doku.php?id=ant:7054

• modifier "Aspice" en "Adspice" • point final oublié à la reprise : "† Non est."

Backported changes proposed by dcrochu (syllabification, spacing, lsc) except Adspice. Also removed episemata on pr-