Merge branch 'master' of github.com:joschabach/micropsi2
"reload native modules" now also reloads nodetypes

plus, display the full error with stacktrace to the user if something goes wrong during reloading.
add worldrunner exception tracking

also, store exceptions by uid.
add a changelog
better error reporting if server offline
performance tweaking for nodenet stepping
get rid of redundant keys() calls
more redundant .keys() calls
fix reload nodefunctions
update monitor list, if slot monitor added

(also, fix refresh on monitor removal)
Merge branch 'master' of github.com:policecar/micropsi2 into minecraft
merges changes from upstream master.