Add reference libraries

[Reference databases](https://www.arb-silva.de/download/arb-files/) provided by the [SILVA project](https://www.arb-silva.de/) can be used within this wrapper by adding the corresponding files to the tool-data directory and editing tool-data/sina_references.loc.sample as follows:

LSU_Parc ${__HERE__}/SILVA_132_LSUParc_12_12_17_opt.arb

LSU_Ref ${__HERE__}/SILVA_132_LSURef_07_12_17_opt.arb

SSU_Ref ${__HERE__}/SILVA_132_SSURef_12_12_17_opt.arb

Ref_NR_99 ${__HERE__}/SILVA_132_SSURef_NR99_13_12_17_opt.arb