added readme

modules/opp/README.md

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+VIM text objects
+========================
+
+Integrates [opp][1] into Prezto, which implements [vim text objects][2] right into vim mode of prezto.
+
+Due to some conflicts with prezto loading, opp will get compiled during initial run.
+
+
+Authors
+-------
+
+*The authors of this module should be contacted via the [issue tracker][3].*
+
+  - [Takeshi Banse](https://github.com/hchbaw)
+
+[1]: https://github.com/hchbaw/opp.zsh
+[2]: http://blog.carbonfive.com/2011/10/17/vim-text-objects-the-definitive-guide/
+[3]: https://github.com/hchbaw/opp.zsh/issues?state=open
+