Add the first MVC - issue_template

Notice that the file name should be underscore-case, and the class
name should be camel-case
Add zh locale and move issue_templates to project_menu
Add title and content locale
Formating index page of issue_templates
Add issue hook
Add issue hook and make it work on New Issue
Add new logic
TODO: try /project/:id/issue_template
Apply /project/:id/issue_templates routes
Support edit action
Add issue notes support
Fix not finding the @project because of find_project_by_identifier
Rename all_templates to templates
Fix not find the project by idetifier and utf8 charset error
Differ new and edit, insert template in issue_description or issue_note
Add readme description
Fix CKEditor missing enter
Merge pull request #1 from ZKHelloworld/dev

feature accomplished