Merge pull request #102 from andrewjpage/master

print errors for invalid input files
print list of excluded sequences
Merge pull request #103 from andrewjpage/print_excluded_sequences

print list of excluded sequences
Support for bipartition trees as input
Merge pull request #104 from andrewjpage/print_excluded_sequences

Support for bipartition trees as input
version in configure
Merge pull request #105 from andrewjpage/print_excluded_sequences

version in configure