Change Tree export to png format
[FIXED] The legend text is no longer cut off at the top when exporting trees to PNG format.
Change Quality criteria for the import of reference genomes
[CHANGED] New type(-strain) reference genome sequences are only included in the TYGS database, if certain quality criteria are met. The latter were recently adjusted, i.e., now genomes with >500 contigs are accepted if the annotation contains a 16S rRNA gene sequence. When introduced this change resulted in the addition of only few dozens of new genome sequences.