new function init_materials_in_database() in htsohm.htsohm to initialize material-rows in DB
new function init_materials_in_database() in htsohm.htsohm to initialize material-rows in DB

WilmerLab/HTSOHM-dev,WilmerLab/HTSOHM-dev,akaija/HTSOHM-dev,akaija/HTSOHM-dev