first sketch at building RPC, but totally broken
rpc expanded a bit, not working yet
rpc: rewrite with ast/monoid and state monad separation (wip)
taskLocal: globals are static to tower_task_usercode_X.c file
rpc monad is a writer
rpc: further sketching out
freertos: test for rpc
tower: more rpc plus a test
wibble

* not sure what i was talking about - looks ok?
existential quantification: ihavenoideawhatimdoing.gif
rpc generates c code that builds
rpc cycles properly, bug fixed
bump ivory-tower version for extension to API