Close #7475: Restore binary & text transform codecs

Close #7475: Restore binary & text transform codecs

The codecs themselves were restored in Python 3.2, this
completes the restoration by adding back the convenience
aliases.

These aliases were originally left out due to confusing
errors when attempting to use them with the text encoding
specific convenience methods. Python 3.4 includes several
improvements to those errors, thus permitting the aliases
to be restored as well.