added _.isRegExp definition
added _.isString definition
added _.isUndefined definition
added _.keys definition
added _.omit definition
added _.pairs definition
added _.pick definitions
added _.transform definition
added _.values definition
moved _.tap to chaining area
modified _.omit definition to use ObjectIterator interface
duplicate test cleanup
added _.escape definition
added _.mixin definition
added _.noConflict definition
added _.parseInt definition
added _.random definition
added _.result definition
added _.runInContext definition
added _.template definition