fix search window to not close with return key

Currently, OgreKit's search window closes automatically when search next command is invoked using return key. We changed this behavior to close the search window only if return key is pressed with shift key. Otherwise just perform search next and the search window remains open.

This fix is based on the following blog article by @aki-null:
http://blog.aki-null.net/blog/2011/10/21/coteditor/
Update Oniguruma's SDK to 10.9
disable Smart Quote/Dash feature on find panel

This new feature substitutes automatically normal quote (") and dash (') symbols with another symbols that are also quote/dash symbol but with an angle, and it is automatically enabled in all NSTextView (and its subclass) if it is build on 10.9.

We know user can disable this feature on the System Preferences system-wide.  However most of average users don't know about it.  Considering the purpose of OgreKit find panel, this feature has less advantages, but just makes user confused.

So I think it's better to disable it on OgreKit find panel.
Merge branch 'refs/heads/fix/smartQuoteAndDash' into coteditor-mod
Merge branch 'refs/heads/fix/windowCloseWithReturn' into coteditor-mod