Merge pull request #15 from ChrisBoesch/master

Update
Merge pull request #16 from ChrisBoesch/master

Update 28/09
Merge pull request #17 from ChrisBoesch/master

Update
Merge pull request #18 from ChrisBoesch/master

update
Merge pull request #19 from ChrisBoesch/master

Update
optimize for IE login
Merge pull request #408 from LI-HE/master

optimize for IE login
Merge pull request #16 from ChrisBoesch/master

update
clear path restriction when change from edit to create story
Merge pull request #409 from ruijunhuang2010/master

Merge pull request #16 from ChrisBoesch/master
Merge pull request #17 from ChrisBoesch/master

update
set default as easy
Merge pull request #410 from ruijunhuang2010/master

update
show practice level number in small screen
Merge pull request #411 from ruijunhuang2010/master

show practice level number in small screen
resume challenge games in Open Challenges
Merge pull request #412 from ruijunhuang2010/master

resume challenge games in Open Challenges
add search filter the challenge list
Merge pull request #413 from ruijunhuang2010/master

add search filter the challenge list
try match path name and badges earned by player