Merge pull request #197 from DavidVorick/events

SendCoin
add memory limit to scripts
add resource exhaustion tests
include stack in memory usage calculation
better output when printing stack
update opcode in translator
add String method to Balance
restore op_send and add client functionality
Merge pull request #198 from lukechampine/reorg

Continued improvements to scripts
Merge branch 'master' into el
add deadlines to bootstrap process