fix some typos

Caught a number of typos with [lein-spell](https://github.com/cldwalker/lein-spell).

If you'd like to catch future typos without false positives, this is your local whitelist that goes in.lein-spell:

```
assertf
authorise
basicdemo
chiba
cljstart
cmnd
customisation
debugf
denormalised
enlive
favourite
fixup
fsmop
invoker
jsch
juergenhoetzel
keypaths
mygroup
mynodes
normalisation
optimisations
organisation
palletops
preseeds
quantal
rsyncing
sanitise
serialise
ulimits
unflagged
useable
```