basic impl of database functions

transaction data to add a function to the database and to invoke a function in a transaction
a new sample to illustrate transaction functions

sample adapted from Adapted from https://gist.github.com/pelle/2635666
Merge branch 'master' into topic/DatomicOps-DbFn

pull in updates from 0.2 release and 0.3 snapshot
update Db Fn branch to 0.3 snapshot

bump numbers is build file
make use of new conversions
`AddDbFunction` is `KeywordIdentified`
Merge pull request #23 from pellucidanalytics/topic/DatomicOps-DbFn

Introduce database and transaction functions