Hi,
I have checked the resource for your theme. I have a vast knowledge in Tumblr theme development, and Tumblr API. I would have implemented features you have requested even if you haven't asked me to. Because I know customization is a big part of Tumblr themes.
I have some suggestions, the theme is concept (the image from Imgur) does't really match the flyout menu, however, I will try to make them workout with each other. The theme looks like a Facebook timeline, so how about making the like and reblog button match the Facebook's?
I am looking forward to hear back from you, and your comment about my suggestions.
Regards,
Adam Azad