cleaning up build
moved most includes of windows.h to llwin32headers.h to disable min/max macros, etc
streamlined Time class and consolidated functionality in BlockTimer class
llfasttimer is no longer included via llstring.h, so had to add it manually in several places
fixed trace data gathering and routing from background thread
simplified slave->master thread communication (eliminated redundant recording and proxy object)
improved performance of fast timer data gathering (slow iterators)
cleaner implementation of llfasttimers...don't bother to share similarly named timers
just create multiple timers with same name...doesn't break anything
Richard Linden