added implicit conversion to bool from SQS Message class
added various functions to allow working with time periods
made Date robust to non-finite numbers
added value descriptions for dates formatted in other manners
added ability to use reflection mechanism to bind functions in the rest request bindings
added ability to start scanning on forEachObjects at an arbitrary point
Merge branch 'master' of github.com:datacratic/soa
moved value descriptions for periodic utils out of types library and into value description library