added muxrpc api to gui sandbox
implemented rpc api for gui posts to add and read replies
added styles to the gui sandbox
exposed the inject() function to guiposts
added two more guipost snippets
emulated gui-post addReply() now alerts what would be posted
gui sandbox style fixes
Merge pull request #106 from pfraze/gui-rpc

Guipost RPC interface to allow "reply to self" and "fetch replies"