Beta version 1.7-beta7

• Fix crash with --scf for rooted tree (reported by Aaron Liston).
• --cf-verbose to print details about gCF for each gene tree (.cf.stat_tree file) and sCF for each locus (.cf.stat_loci file).
• Parallelised sCF computation.
• --bisymtest-remove-bad[-good] will write .good.nex or .bad.nex partition file (requested by Renee Catullo).
• Ancestral sequence reconstruction (-asr) now works when there are absent state(s).
• Bug in eigen decomposition and matrix exponentiation for Lie Markov models.