Changes:
- :func:`searchPfam` uses hmmer for given sequence inputs instead of pfam search.
New Features:
- :func:`.buildPCMatrix` is implemented for calculation of coevolution with PSICOV method from multiple sequence alignments.
- :func:`specMergeMSA` is implemented for merging multiple sequence alignment files based on the species identifiers of sequences.
- :class:`.exANM` is implemented for explicit membrane ANM calculations.
- :func:`.writeMembranePDB` is implemented for writing PDB structures of created membranes for exANM class.