* Improve draw performance of scroll lists by only drawing what is visible
* Reduce frequency of expensive column width calculations
Fixes by Richard

* Remove debug spam

* LLScrollListControl to use LLAvatarNameCache instead of gCacheName

* Use LLAvatarNameCache in group UI to match what namelists use and prevent double lookups
* Remove LLSD -> Prams legacy pattern which is super slow.
* Member list on general tab only adds to the list after names are known

* Fix bad font name in llpanelgrouplandmoney

* llpanelgroupinvite to use LLAvatarNameCache isntead of legacy gCacheName

* Clean up 'is group' extra data in namelists.

* Split avatar name requests up among multiple frames to prevent overloading
  the nameserver and having requests time out.

MAINT-1228, MAINT-1668:  Deleting code that had been originally deleted to fix these issues, but then was accidentally re-introduced during a bad merge.

Removing build.sh darwin symbols hack.  Adding '-g' to both CFLAGS and CXXFLAG to have cmake generation debug symbols in xcode.

MAINT-1753: Correcting behavior of ll_aligned_realloc_16() on Linux to avoid memory corruption in the case that the new memory size requested is smaller than the old memory size.  Also, adding check to ensure that the aligned malloc returns a non-null value before memcopying.

Update script that generates Google Breakpad symbols to look in tghe right place first and default to the original location if not found.

Reviewed by VoidPointer

MAINT-1684: Correcting the calls to ll_aligned_free() which should have actually been to ll_aligned_free_16().

MAINT-1684: Attempt at correcting the linux crash on startup.  Replacing the memory allocations and frees in the LLPrivateMemoryPool with aligned memory allocations and frees.

Reviewed by VoidPointer

MAINT-1636: Turning off tcmalloc for the build now that davep's changes are in to fix our major crasher.

- Fixed an issue where group list wouldn't fall back to UDP if the region doesn't support the new GroupMemberData capabaility
- Fixed a potential null pointer crash.

Thanks to Ansariel from Firestorm for these!

Reviewer: Myself

Fix non-thread-safe refcounting of LLHTTPClient::Responder and fix out-of-order deletion of LLTextureFetch on shutdown