Updated.
Added New React Core section to components.

The react_components section now has a react_core section
which allows me to start re-writing bootstrap based components in
pure react.

This react_core name will change to react_bootstrap in time. The code is
untested but at this time not breaking so gulp will compile everything.

This adds React Bootstrap code such as overlay, overlay trigger and
various mixins to help. This section does require _.extend() from
underscore for one mixin. We do not use require or module export.

Component section has an animation section which contains the over lay
code.