updated vertebrates MLSS XML file
updated vertebrates MLSS XML file

- Updated references for LastZ PWAs
- Defined specific assemblies for most species involved in EPOs and
  Mercator-Pecan
- Removed families
- Added missing references to assembly patches
- Updated comments

Ensembl/ensembl-compara,Ensembl/ensembl-compara,Ensembl/ensembl-compara,Ensembl/ensembl-compara,Ensembl/ensembl-compara,Ensembl/ensembl-compara,Ensembl/ensembl-compara,Ensembl/ensembl-compara