biology/barrnap: Update descr

biology/barrnap/pkg-descr

@@ -1,6 +1,8 @@
-SIMD-vectorized implementation of the Viterbi algorithm for profile HMM
-alignment and introduced various other speed-ups. This accelerated HHsearch by a
-factor 4 and HHblits by a factor 2 over the previous version 2.0.16. HHblits3 is
-~10x faster than PSI-BLAST and ~20x faster than HMMER3. Jobs to perform HHsearch
-and HHblits searches with many query profile HMMs can be parallelized over cores
-and over servers in a cluster using OpenMP and message passing interface (MPI).
+Barrnap predicts the location of ribosomal RNA genes in genomes. It supports
+bacteria (5S,23S,16S), archaea (5S,5.8S,23S,16S), metazoan mitochondria
+(12S,16S) and eukaryotes (5S,5.8S,28S,18S).
+
+It takes FASTA DNA sequence as input, and write GFF3 as output. It uses the new
+nhmmer tool that comes with HMMER 3.1 for HMM searching in RNA:DNA style.
+Multithreading is supported and one can expect roughly linear speed-ups with
+more CPUs.