some tools that might be handy: * Merge - two or more .crispr files together * Split - a .crispr file apart * Filter - remove/copy groups if they fit/don't fit criteria + number of spacers * Extract - fasta sequences + direct repeats + spacers + flankers + concensus sequences * Draw - a graphviz representation of the crispr * Sanitise - change all the unique ids to incrementing numbers * Extract/Add metadata