Additional logging

Additional logging

This particular case of LLAPRFile crashes due to thread issues (and if it doesn't it might be affecting some other apr call due to using default pool).
Function is not opening the .dsf file in question and LLAPRFile won't ensure that file exists till the end of the function, it just checks that file exists at a given moment. No point to overcomplicate things by adding thread safe pool, so replaced with dirutil.

This set of changes reverts the merge with master (git revert c83e740e) and results in a version of the DRTVWR-519 that matches what was presemt before it was deployed as a release viewer *plus* 3 small fixes from Maxim (See commits).  This branch can now be used for additional fixes before eventually being used to release D-519 as normal

This reverts commit e61f485a, reversing
changes made to 00c47d07.

Complete the change from lldiskcache -> llfilesystem and then addition of new lldiskcache implementation

The folder where the disk cache lives was originally renamed from llvfs to llcache but @henri's suggestion that that doesn't reflect the other files in the same place and it should be llfilesystem is a good one so I changed it over

Renamed the references to LLVFile and llvfile.* source code plus cmake scripts to use a different name - lldiskcache - since that more closely resembles what it is (or will be) now that the VFA is no more

First part of change to remove LLVFS from the Viewer. Consists of code changes to remove LLVFS and LLVFSThread classes along with the associated source files. The existing llvfs folder is renamed to llcache. Also includes changes to CMake script in many places to reflect changes. Eventually, llvfile source file and class will be renamed but that is not in this change.

Also adds correct working directory to RelWithDebInfoOS and enables OpenAl on OS builds for windows

Update to build on Xcode 6.0: clang detecting unsigned int (size_t) comparison with <0 [-Wtautological-compare]

Copy3rdPartyLibs needed to copy the now-corrected fmodexL libraries
and it had a bad library reference on Linux for release.  In
llaudio land, the audio engine interfaces, even the fmodex
specializations, seem to want to be external-structure free
so use a forward declaration and pointer to FMOD_DSP_DESCRIPTION
and deal with it in the ctor/dtor.

MAINT-3804 FIXED Crash in LLAudioEngine::getAudioData when playing gestures with audio device disabled.

- Removed logging for MAINT-3555
- Added NULL guard to fix MAINT-3703 (hopefully)