Merge pull request #8 from ChrisBoesch/master

update
Merge pull request #20 from ChrisBoesch/master

update
Merge pull request #247 from ShaikDawood/master

Challenge Bug#1 fixed
Merge pull request #9 from ChrisBoesch/master

update
Solved the dnd game button malfunction issue
Merge pull request #248 from LI-HE/master

Solved the dnd game button malfunction issue
Merge pull request #249 from ruijunhuang2010/master

Merge pull request #20 from ChrisBoesch/master
Merge pull request #21 from ChrisBoesch/master

update
Merge pull request #250 from ShaikDawood/master

Challenge Bug fixed#2
Merge pull request #251 from ruijunhuang2010/master

Merge pull request #21 from ChrisBoesch/master
Merge pull request #22 from ChrisBoesch/master

update
Update controllers.js
Merge pull request #10 from ChrisBoesch/master

update
sloved the beginner path not shown problem
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 #85 from ChrisBoesch/master

Updates