promote sub group handling and other misc updates

Merge pull request #486 from topcoder-platform/develop

promote sub group handling and other misc updates

blockchain content update, new terms flow

Merge pull request #480 from topcoder-platform/develop

blockchain content update, new terms flow

added group to topgear

Merge pull request #474 from topcoder-platform/develop

added group

themr update, topgear content

Merge pull request #473 from topcoder-platform/develop

themr update, topgear content

added content to homepage (build fix)

Merge pull request #470 from topcoder-platform/develop

fix build

added content to homepage

Merge pull request #469 from topcoder-platform/develop

added content to homepage

updated footer

Merge pull request #468 from topcoder-platform/develop

updated footer

tweaks for blockchain

Merge pull request #467 from topcoder-platform/develop

tweaks for blockchain

more blockchain content updates

Merge pull request #465 from topcoder-platform/develop

more blockchain content updates

More updates in Blockchain community

Merge pull request #463 from topcoder-platform/develop

More updates in Blockchain community