Merge pull request #2 from ChrisBoesch/master

updating my repo...
Amendments made due to Angular JS updates

affected pages are profile and challenges.html
Merge pull request #5 from ruijunhuang2010/master

update
Merge pull request #3 from ChrisBoesch/master

updating my repo...
updated challenges.html

in order to view detail of each challenges...
challengedetails html mockup
Merge pull request #6 from ShaikDawood/master

Minor changes..
Minor update

challenge.html
updated js
Merge pull request #7 from ShaikDawood/master

Minor changes..
Merge pull request #4 from ChrisBoesch/master

update