revert back to original yaml, csv, and db readers
revert reader back to its original form and duplicate it into YamlReader. Use csv reader in computation test instead of yamlreader
very initial and hacky version of the Yaml Reader, checkpoint commit for cleanup
cleanup
renaming things to make a bit more sense, slight simplification of childOfType
merge Paul Blairs changes
merge TableReader and Reader, rename AbstractReader to Reader
Rename persistent nodes to TableNodes now that they are only used by the TableReader
Merge pull request #31 from theunforgiven/split-readers

Split TableReader and YamlReader into separate readers