CLC-1618 Add feed for all reg blocks, active and inactive, sorted by blocked_date descending
CLC-1618 Fix crash on cached feed when reason and office are empty
CLC-1618 Explicitly expire MyRegBlocks at 48hrs
CLC-1618 Remove is_active from feed since it's redundant
Merge pull request #926 from ctweney/regBlocks

CLC-1648 First part of backend for My Academics page