Add ability to add defaults to CSV and SQL formats
fix failing CsvParserTest
add ability to add defaults to Yaml format
cleanup odd expression
convert TableReader computation expression into an attribute value
convert TableReader resultKey into attribute value
convert TableReader logger into attribute value
fix failing test
convert TableReader securityConfiguration into attribute value, fix failing test
convert TableReader predicateExpression into attribute value
convert TableReader initialAccumulatorKey into attribute value
remove the ability to default anything but an attribute value, convert defaults into a single node with attributes
Merge pull request #34 from theunforgiven/defaults-after-split-readers

Allow defaults to be specified in the version level
Merge branch 'master' of https://github.com/cyrusinnovation/computation-engine