Clinker

* Added colour map argument when specifying groups

* Explicitly check for BioPython version when splitting Alignment/PairwiseAlignment objects instead of try/except

* Fixed an issue with parsing pairwise alignments after changes to default printed format in BioPython v1.80 (https://github.com/biopython/biopython/issues/4183). Should now work fine pre/post v1.80. (https://github.com/gamcil/clinker/issues/91)

* Fix crash when no CDS features are found parsing GFF records (10)

* Don't open web browser after creating static HTML when file name is provided (88)

* Added ``-gf/--gene_functions`` argument for grouping genes by shared function/category, instead of just sequence similarity.

Given a 2-column CSV resembling:


GENE_001,Cytochrome P450
GENE_002,Cytochrome P450
GENE_003,Methyltransferase
GENE_004,Methyltransferase


Two groups are generated, Cytochrome P450 (GENE_001 and 002), and Methyltransferase (GENE_003, GENE_004).

* Updated clustermap.js. Gene groups now have tooltips when the corresponding label in the legend is right-clicked, and can now be easily merged to combine groups that share some function/category that did not group together by similarity alone