Merge pull request #363 from jay-hodgson/evaluation-overview-place

Challenges place for overview
Merge pull request #364 from jay-hodgson/release-y

Merge evaluation overview place into release-y
Merge pull request #365 from jay-hodgson/release-y

SWC-650
SWC-652 add three challenges to home page, remove bccSetup
updated link
Merge pull request #367 from dburdick/swc-652

Swc 652
added numerate logo
Merge pull request #369 from dburdick/swc-652

added numerate logo
SWC-654: make join widget support subchallenges
Merge branch 'release-y' of https://github.com/Sage-Bionetworks/SynapseWebClient into release-y