from pull-request 3

* feature/issue-share:
  my-issues: Show shared issue list
  issue: Issue sharing feature - support notification
  issue: Issue sharing feature - view and message
  issue: Issue sharing feature - Build api
  issue: Issue sharing feature - Add model

Reviewed-by: Mijeong Park 

from pull-request 2

* feature/noti-diff:
  fix: Remove logic for rendering markdown (duplicated HTML tags)
  refactoring: Remove reassigning value to argument
  fix: Add logic for rendering markdown again
  refactoring: Separate logic as private function from public function
  noti: Modify logic for sending email noti to use diff format
  noti: Add method for getting noti message with Plain format
  refactoring: Modify html tag for new line
  noti: Add function for sending email noti with Plain format in case of ISSUE_BODY_CHANGED
  typo: Modify test method name
  noti: Add logic for sending email noti with HTML format in case of ISSUE_BODY_CHANGED
  message: Add NAVER LABS Corp to comment
  refactoring: Modify String class to StringBuilder class
  util: Add function for getting diff(Plain format) between two values
  util: Add function for getting diff(HTML format) between two values

Reviewed-by: doortts 

It adds LDAP server network timeout case

from pull-request 1

* issue/82:
  view: Remove ux(number of heart) & Add new feature for copying email to message(voters more)
  view: Modify button for copying emails based on application config of showing user email
  script: Add alert message to notify clipboard support error in browser
  script: Use API to check if clipboard is supported & Add alert message when copying email was successful
  script: Move creation code of clipboard object after loading clipboard lib
  issue: Add feature to get the list of voters and to copy emails of voters
  css: Remove unnecessary direction property
  issue: Add feature to get the list of voters and to copy emails of voters
  conf: Add message for copy email button

Reviewed-by: Mijeong Park