Merge pull request #161 from peterzd/api_home

[feature]response photo/:id
Merge pull request #163 from peterzd/api_home

Api home
Merge pull request #165 from peterzd/api_home

[chore]return likes_count and status
[feature]new version of multiple upload

Note: remove start upload button
Merge pull request #167 from peterzd/fix_multiple_upload

[feature]new version of multiple upload
[chore]image url
Merge pull request #169 from peterzd/fix_multiple_upload

[chore]image url
[bug]make my_wall page same as design
[bug]use new load more for my_wall and following pages
Merge pull request #171 from peterzd/fix_my_wall

Fix my wall
[bug]make image bigger to display page
[chore]rake task to process images to add `show` style

Note: run `rake image:reprocess`
Merge pull request #173 from peterzd/fix_image_show

Fix image show
[chore]add pre-loader for show images
Merge pull request #175 from peterzd/fix_image_show

[chore]add pre-loader for show images
[feature]user can comment on photo