lift/framework — pull request #1456 by fmpwizard (2013-07-28 01:29:32+00:00)
Title: Deprecate .is on mapper and fix the one on Record

See discussion here
https://groups.google.com/forum/#!topic/liftweb/oz5NkyvFOkM

Basically, `.is` and `.get` do the same in mapper, so we will deprecate `is` and use `get` instead.

Record already deprecated `is` but there is at least one more place where it needs to be deprecated.