Update to build on Xcode 6.0: collection of similar const var not used warnings/errors [-Wunused-const-variable]

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

continued conversion to units system
made units perform type promotion correctly and preserve type in arithmetic
e.g. can now do LLVector3 in units
added typedefs for remaining common unit types, including implicits

added convenience types for units F32Seconds, etc.

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

consolidated most indra-specific constants in llcommon under indra_constants.h
fixed issues with operations on mixed unit types (implicit and explicit)
made LL_INFOS() style macros variadic in order to subsume other logging methods
such as ll_infos
added optional tag output to error recorders

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

improved unit tests for LLUnit
renamed LLUnit to LLUnitImplicit with LLUnit being reserved for
explicit units

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

Finished making LLUnit implicitly convertible to/from scalar integer values
cleaned up test code

further fixes to implicit conversion of unit types

Change Linux fasttimer implementation back to RDTSC - using a reliable syscall was REALLY chewing CPU time.  Sigh.  I didn't realize how incredibly often this gets called.  So, back to the assembly.
But be more careful with CPU clock count on linux, so the fasttimer values are much more accurate than they were the last time we were with RDTSC, in absolute terms - back in the right order of magnitude anyway.

Also change many instances of Mhz to MHz.
Also some minor comment fixes.

move LLEventTimer into its own source module.  everyone includes it, almost no-one wants it.  now I can dick with it a bit without rebuilding the world, at least. :)

Ugh. Update on Tofu's patch for this bug.
Reviewed by Richard

For both the (so far unused) generic KEY form and the KEY = T* form, provide
key_iter, beginKeys(), endKeys().
Change instance_iter so that when dereferenced, it gives you a T& rather than
a T*, to be more harmonious with a typical STL container. (You parameterize
LLInstanceTracker with T, not with T*.)
Fix existing usage in llfasttimer.cpp and lltimer.cpp to agree.
For the KEY = T* specialization, add T* getInstance(T*) so client isn't forced
to know which variant was used.
Add unit tests for uniformity of public operations on both variants.

ignore-dead-branch

Result of svn merge -r107256:107258 svn+ssh://svn/svn/user/phoenix/license_2009_merge into trunk. QAR-1165

svn merge -r106715:HEAD svn+ssh://svn.lindenlab.com/svn/linden/branches/q/notifications-merge-r106715 .  QAR-1149 -- Final merge of notifications to trunk.

QAR-907: svn merge -r 98908:98910 svn+ssh://svn/svn/linden/qa/sim-metrics/sim-metrics2-release-merge-98903 into release

merge release@93398 viewer-merge-1@94007 -> release
dataserver-is-deprecated

dataserver-is-deprecated

dataserver-is-deprecated
for-fucks-sake-whats-with-these-commit-markers

Passed QA as part of QAR-491.

svn merge svn+ssh://svn.lindenlab.com/svn/linden/release@84853
svn+ssh://svn.lindenlab.com/svn/linden/branches/moss/signalcrap-merge1