Merge pull request #95 from ShaikDawood/master

Updating a new theme in a separate folder "app-white" and revert my earlier commit.
Added stories with required paths variable and an image url.
archive story
Added Story & feeback to Nav bar
replaced home page with static pic
retrieve story image
Merge pull request #28 from ChrisBoesch/master

update
resloved the $digest issue
Merge pull request #96 from LI-HE/master

resloved the $digest issue
show national flag in challenge list
code formatting #1
changed home video from iframe to pop up
Merge pull request #97 from LI-HE/master

changed home video from iframe to pop up
minor css change for home page and deleted unecessary file
Merge pull request #98 from LI-HE/master

minor css change for home page and deleted unecessary file
Load challenges made by other users
Revert "Load challenges made by other users"

This reverts commit 13214f8607ed14f897e13d80c383bc2c8a666558.
Merge pull request #29 from ChrisBoesch/master

update
minor change to story and new stroy show #1
Merge pull request #99 from LI-HE/master

minor change to story and new stroy show #1