use function instean of class
make the functions much better :D
more exactly regexes
better names of funcs
escape the quotes
better condition
renamed a var
use better way to literalize
removed the chardet feature

It is because there has some problem to show the correct literal.
removed __all__
added docs
make target_encoding essential
the blank line seems not need
merged the two unesacpe functions
better var names, comments and docs
just return the original literal
better func name
fixed the typo in doc
use doctest
added the change log for v0.3.2