and drop OSX requirement, it is not needed after all

* Replaced Wrapper with WrapIt

Original author @lattespirit offered to remove Wrapper from the channel in favor of a new strongly enhanced version.
See here: https://github.com/lattespirit/SublimeWrapper/issues/7

WrapIt shares the core function of Wrapper but is a complete rewrite and adds support for custom wrappers and key bindings.

* Removed readme link from WrapIt

* Adjusted URL

Adjusted to new details URL due to username change.

* Removed bfelder as author of WrapIt...

... author determined automatically

Syntax highlighting for taking math notes

This was agreed upon with @braver and @wbond.