add Core Locaiton framework
show location on the main view
Merge commit 'dfebd9276d8e3bd2345f86fd13ba4677b0b025dc'

# By Yesi Xu
# Via Yesi Xu
* commit 'dfebd9276d8e3bd2345f86fd13ba4677b0b025dc':
  show location on the main view
  add Core Locaiton framework