10% first threshold and modified proportion per rank

Created by: hoelzer

@guille0387 implemented discussed changes of the voting system to better reflect the updated NCBI taxonomy metadata file and general taxonomic assignments:

• lowered the 20% cutoff of discovered informative HMMs to 10%
• taxonomy is now assigned by comparing the number of HMMs from the same rank to the total number of identified models for this rank {genus/subfamily/family/order}
  • for example: before the number of HMMs identified for a specific genus were compared to the total number of all identified proteins and due to that the cutoff of 60% was not reached in many cases