updates appearance utility dependency

added flag to LLInstanceTracker to allow multiple values per key
made StatType allow multiple values per key to eliminate block timer related crash

added more MemTrackable types
optimized memory usage of LLTrace some more

removed complicated and unnecessary fast timer gapless handoff logic (it should be gapless anyway)
improved MemTrackable API, better separation of shadow and footprint
added memory usage stats to floater_stats.xml

renamed "current" to "primary" when referring to accumulators

another attempt to move mem stat into base class

changed unit declarations macros to make a lot more sense

made getPrimaryAccumulator return a reference since it was an
always non-null pointer
changed unit conversion to perform lazy division in order to avoid truncation
of timer values

added convenience types for units F32Seconds, etc.

replace llinfos, lldebugs, etc with new LL_INFOS(), LL_DEBUGS(), etc.

moved object cache sampling code so that it actually gets executed
default values for stats are NaN instead of 0 in many cases

fixed ostream precision munging in llsys

also, removed LLTrace::init and cleanup
removed derived class implementation of memory stat for LLMemTrackable
is automatic now

removed LLThreadLocalSingleton
collapsed all thread recorder classes to single type, LLTrace::ThreadRecorder
moved fasttimer stack head to llthreadlocalsingletonpointer via ThreadRecorder

added ability to force uniqueness of LLCopyOnWritePointer
converted more variables to units
added convenience function for unit constants

moved collapsed flag to fast timer tree node

removed implicit flushes on reads from recorders for better performance
made sure stack timers were updated on recorder deactivate
faster rendering and better ui for fast timer view

added getAs and setAs to LLUnit to make it clearer how you specify units
removed accidental 0-based indexing of periodicRecording history...
should now be consistently 1-based, with 0 accessing current active recording
removed per frame timer updates of all historical timer bars in fast timer display
added missing assignment operator to recordings

changed Units macros and argument order to make it more clear
optimized units for integer types
fixed merging of periodicrecordings...should eliminate duplicate entries in sceneloadmonitor history

reverted SlaveThreadRecorder update gating
moved processTimes() outside of Recording, so it is called only once per frame
refined sample merge logic so that multi-threaded samples do not stomp on linear history
of a stat

removed PeriodicRecording::getTotalRecording as it was showing up at the top on the profiler
renamed getPrevRecordingPeriod, etc. to getPrevRecording

fix for inaccurate optimization of full block time calculations

streamlined fast timer delta tracking

fixed anamolous LLFastTimer timings

added debug output to BlockTimer