use the zinc incremental compiler
use the zinc incremental compiler

if the zinc server is started, then we can spare the jvm warmup time
upon recompilation. If it is not started, then the normal zinc
incremental compilet is used to recompile only files that need to be
recompiled (i.e. that changed...)

gnieh/sohva,gnieh/sohva,gnieh/sohva