compatible with Redmine 2.1

	use jquery in Redmine instead of in this plugin
compatible with Redmine 2.1

	replaced link_to_remote (to call preview) with preview_link
bump version to 0.4.0
fixed tag_add function

	canonicalize loading
fixed behavior/position of completion-list
fixed ordering of event-handlers
changed to use jQuery.trim instead of tagtrim
modified hashmap statement (following ruby 1.9)
added method `editable_by?' into Blog

    to check authority when edit/delete entry
modified options passed to method `allowed_to?'
modified blog view: enabled to hide comment form
show notice after deleting entry
modified hashmap statement (following ruby 1.9)
fixed method `edit'

    check request.put? instead of request.post?
modified localization
refactoring get_tag_list
conformed view of edit to journal's one
customize tag_counts, filter by project
Merge pull request #1 from kkkon/customize-tag_counts-by-project-ichizok/redmine2.1

customize tag_counts, filter by project
reverted to being compatible with ruby 1.8: hash expressions