Merge pull request #196 from mrdomino/master

Use standard format specifiers for 64bit ints
Fix some profiling stuff.
Merge branch 'master' of https://github.com/urbit/urbit
Remove annoying printf.
Various profiling and other fixes.
100 profile samples per second, in theory anyway.
Remove overly fancy profile sync code.
Remove debug code.
fixed dill subscription lossage
backport ^O to non-broken ships
added legacy note
Fix profile bug.
text/json
don't play back own messages
Merge branch 'master' of https://github.com/urbit/urbit
added some printfs to gall
Make empty sets and maps size zero.

Changes the one use of wyt:by to match the old behavior.
Merge pull request #199 from gkelly/fix-wyt

Make empty sets and maps size zero.
Update some profiling stuff.
added :reset