Merge pull request #22 from ChrisBoesch/master

update
Merge pull request #252 from LI-HE/master

sloved the beginner path not shown problem
Update practice.html
Merge pull request #253 from ruijunhuang2010/master

Merge pull request #22 from ChrisBoesch/master
Merge pull request #23 from ChrisBoesch/master

update
Merge pull request #85 from ChrisBoesch/master

Updates
Merge pull request #254 from LI-HE/master

debug for IOS 6 video pop up #1
Merge pull request #255 from ruijunhuang2010/master

Merge pull request #23 from ChrisBoesch/master
Merge pull request #24 from ChrisBoesch/master

update
Merge pull request #256 from ruijunhuang2010/master

Merge pull request #24 from ChrisBoesch/master
Test Pull Request
Merge pull request #257 from jownsftw/master

Test Pull Request
Merge pull request #86 from ChrisBoesch/master

Updates
Challenge bug fixed #2

- User able to see message from server after submit his/her message.
Merge pull request #258 from ShaikDawood/master

Challenge Bug fixed#2
Merge pull request #25 from ChrisBoesch/master

update
country selection in profile edition
Merge pull request #259 from ruijunhuang2010/master

update
tags addition in profile edition
Merge pull request #26 from ChrisBoesch/master

Merge pull request #259 from ruijunhuang2010/master