[Fluxus] new commits

[gabor papp]

> I added a much-needed function to clear the screen!!!
thanks! this is quite useful when you overload the scratchpad.
if you type for example (namespace-mapped-symbols) in the repl, fluxus 
really slows down. this cures it.

> It also clears the history in the Repl.
ctrl+q does clears the history for me. although i'm not sure when this 
would be useful. really hardcore livecoding, when you don't just start 
from scratch all the time, but you also erase your memory?

best,
gabor