0.83 - Improve conditionals

• Fix some false sharing scenarios.
• Handle even more complex conditionals with ludicrous inline assignment. ShortCircuitAssignTest4e(!).
• Fix issues with ugly code from early-detected ternaries
• Allow for loops to capture multiple updates, (but only if they're involved in the predicate, for cleaner code. Override with --forloopaggcapture to capture all possible updates).
• Fix bug whereby conditionals were being too aggressively merged.
• Other improvements to conditional merging.