Add Daniel to list of authors. Change some more uses of "contained type" to "contained object.
Remove a lengthy note from ValueType requirements as tutorial in nature and thus beyond the scope of the standard library or a library TS. Rework the specifications for construction from ValueTypeand assignment from ValueType to be more precise and to  eliminate errors that had crept in as C++11 features were applied. (Daniel Krügler private email 2013/05/09. Remove the ValueType requirements section, and add a Requires: element to the signatures that actually require CopyConstructible or MoveConstructible, and make related wording changes following current practice of the standard library for containers.