SUGGESTION:Add an empty code block / renaming blocks
It would be nice if there was some sort of empty block that you could use to put some customized code in,
because sometimes I just want to add some functionality rather than customizing an existing block.
I know I can create a new block, but when it's for code unique to a particular mashup,
this doesn' make much sense. So, it would be nice to have a "Code" block.
Also, it would be useful if you could rename blocks.
Thanks.

