Use setters instead of public properties
Summary: Currently a bunch of properties in the AASTNode class are public instead of using explicit setter methods. This doesn't seem to have any effect on performance as far as I can tell
Test Plan:
Ran the following script with 100 iterators:
{P1892}
Before
Average: 2.679129s Total: 267.912916s
After
Average: 2.648229s Total: 264.822857s
Reviewers: epriestley, #blessed_reviewers
Reviewed By: epriestley, #blessed_reviewers
Subscribers: Korvin
Differential Revision: https://secure.phabricator.com/D14504