Added TS translation of SizeTree for particle system.
Added TS translation of SizeTree for particle system.

Also fixed minor hint errors on == vs === and JS idiom for checking
object is defined.

turbulenz/turbulenz_engine,sanyaade-teachings/turbulenz_engine,tianyutingxy/turbulenz_engine,sanyaade-teachings/turbulenz_engine,supriyantomaftuh/turbulenz_engine,turbulenz/turbulenz_engine,chkjohn/turbulenz_engine,changemypath/turbulenz_engine,supriyantomaftuh/turbulenz_engine,chkjohn/turbulenz_engine,changemypath/turbulenz_engine,turbulenz/turbulenz_engine,turbulenz/turbulenz_engine,dtebbs/turbulenz_engine,supriyantomaftuh/turbulenz_engine,sanyaade-teachings/turbulenz_engine,turbulenz/turbulenz_engine,dtebbs/turbulenz_engine,tianyutingxy/turbulenz_engine,sanyaade-teachings/turbulenz_engine,dtebbs/turbulenz_engine,chkjohn/turbulenz_engine,supriyantomaftuh/turbulenz_engine,sanyaade-teachings/turbulenz_engine,youprofit/turbulenz_engine,changemypath/turbulenz_engine,youprofit/turbulenz_engine,changemypath/turbulenz_engine,tianyutingxy/turbulenz_engine,youprofit/turbulenz_engine,changemypath/turbulenz_engine,dtebbs/turbulenz_engine,supriyantomaftuh/turbulenz_engine,youprofit/turbulenz_engine,chkjohn/turbulenz_engine,tianyutingxy/turbulenz_engine,youprofit/turbulenz_engine,chkjohn/turbulenz_engine,tianyutingxy/turbulenz_engine,dtebbs/turbulenz_engine