Nil safe feature flag memoization and presence check
Improved feature flag check
CDB extension memoization
db_size_in_bytes memoization
db_size_in_bytes multiple load fixed in presenter instead of model
Avoid computing db_size_in_bytes twice
Increased default log level to debug so development servers display SQL queries
Merge pull request #1511 from CartoDB/1505-Improve_dashboard_root_request

1505 improve dashboard root request