added LLThreadLocalPtr
broke llmutex out into llmutex.h
got primary sampling buffer under thread local storage

renamed some variables/methods

added multi-threaded sampling to LLTrace
first pass at data aggregation

added buffer merging and copying

created buffer type for storing trace data
added merging logic for different trace types

further development of lltrace (accumulator and storage classes)

further development of lltrace

lltrace cleanup

renamed some variables in lltrace

build fix

first pass at LLTrace framework

open root timer by default

cleaner implementation of llfasttimers...don't bother to share similarly named timers
just create multiple timers with same name...doesn't break anything

removed checkforDuplicates since we support duplicates again

allow duplicate named fast timers again, refactored timer code

further cleanup of LLStat
removed llfloaterlagmeter

Reviewed by me. (Bao created)