Merge pull request #249 from zrax/no-newzero

Deprecate and remove NEWZERO macro
Plug some simple leaks detected during startup
Yes, we really do want to wait for the transactions to get cleaned up before terminating the loop that cleans them up (fixes NetTrans leaks)
Fix vault node data leak when field content flags are set but not flagged
Add proper member access control to NetVaultNode