add local cache repository for speed purpose (subversion) or for browsing a external repository

for SCM that can handle only local copy (git).


git-svn-id: http://redmine.rubyforge.org/svn/branches/nbc@1899 e93f8b46-1217-0410-a6f0-8f06a7374b81

lang/zh.yml

@@ -641,3 +641,5 @@ default_activity_development: 开发
 enumeration_issue_priorities: 问题优先级
 enumeration_doc_categories: 文档类别
 enumeration_activities: 活动（时间跟踪）
+setting_repositories_cache_directory: Cache directory for repositories
+field_cache: Local cache