Deprecate react-ie8

I have realized that it was foolish to include all possible requirements in one package, because once they are bundled into one js file, all required files will be included, although some may not be useful.

So package react-ie8 _will be deprecated_.

In addition, react-ie8 will focus on providing a series of examples for people who are facing the same compatible problems, as will as collecting issues.

Have fun with react-ie8 examples, and feel free to open an issue.