A level of preprocessor indirection lets us later change the implementation if
desired.

This also introduces LLContinueError for exceptions which should interrupt
some part of viewer processing (e.g. the current coroutine) but should attempt
to let the viewer session proceed.

Derive all existing viewer exception classes from LLException rather than from
std::runtime_error or std::logic_error.

Use BOOST_THROW_EXCEPTION() rather than plain 'throw' to enrich the thrown
exception with source file, line number and containing function.

Also place KDUError into anonymous namespace to emphasize that it's entirely
local to this .cpp file.

KduError is derived from std::runtime_error, so the message string becomes its
what() message.

whose body reads:

    // *FIX: This exception is bad, bad, bad. It gets thrown from a
    // destructor which can lead to immediate program termination!
    throw "ll_kdu_error() throwing an exception";

which would be bad indeed... if ll_kdu_error() were ever actually referenced
by anything!

Use the same signatures as for the other platforms.

Update to build on Xcode 6.0 (fix unit tests): turn off warnings for multiple unused private members

Update to build on Xcode 6.0: remove #pragmas from code to deal with tut warnigs/errors (moved to package) AND bracket clang #pragmas in #if LL_DARWIN

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

stat definition as they don't work on gcc/clang

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

copied over scene load frame differencing changes from viewer-interesting
made periodicrecording flexible enough to allow for indefinite number of periods
added scene loading stats floater
fixed collapsing behavior of container views

fix for unit test failures...cleanup apr without destroying
pools, allowing LLProxy to clean itself up as a singleton (and
avoiding spurious dependencies associated with manually destorying
singletons that rely on apr pools)

CHUI-380: Final commit for this issue. After code review changed some method names to be more accurate. Also using dynamic_cast instead of static_cast for safety.

CHUI-380: (In progress) Refactoring needed to fix focusing issues when selecting an existing conversation item. This commit resolves re-introducing bug CHUI-289. Will code review and cleanup code in next commit.

Fleshed out target_link_libraries dependencies between libraries.  Appearance utility now reads avatar_lad.xml during stubbed out params processing.

follow up to fix test compiles.

SH-3075 : Fix reversible compression for very small textures. Also supress the forcing to reversible for small textures.

SH-3075 : Fix reversible compression for very small textures. Also supress the forcing to reversible for small textures.

SH-3060 : Complete new byte range computation, clean up and back pedal on some changes that didn't pay of.