Merge pull request #404 from fgiannar/develop

updates #388, #390
Demographics and pie charts fix.
Merge pull request #405 from fgiannar/develop

update #390
Merge pull request #406 from fgiannar/develop

minor fix
Merge pull request #408 from fgiannar/develop

close #407
Merge pull request #92 from cassandra-project/develop

get updates