For the uninitiated:
I made a few additions / modifications to the code and the plugin has been updated to 1.1.0. The changes are:
Added Custom tag support for adding quotes anywhere in your posts/pages
Added Custom quote separator support and multi-line quotes support
Config Screenshots:
I recommend that you update to this new version asap, as apart from the above mentioned changes, the code is a bit more cleaner as well, which would run a bit better IMO and also help in any modification if you have in mind.