translation for publishers

config/locales/en.yml

@@ -16,6 +16,7 @@ en:
     form_to_start : "From"
     form_to_end : "To"
     total_pages : "Total Pages"
+    publishers : "Publishers"
     keywords : "Keywords"
     abstract : "Abstract"
     publication_date : "Date of Publication"

config/locales/zh_tw.yml

@@ -15,6 +15,7 @@ zh_tw:
     issue_no : "期數"
     form_to_start : "起"
     form_to_end : "訖"
+    publishers : "出版商"
     total_pages : "總頁數"
     keywords : "關鍵字"
     abstract : "摘要"