MAINT-4077: Refactoring to add copy constructors to the LLVisualParam class and all of its derived descendants in order to clarify ownership of memory pointers.

EXT-7626 FIXED LLTexLayer header file cleanup
EXT-7628 FIXED Don't cache lower res baked textures

Added more information into the texture debug view.
Mangled hash when uploading lower res baked textures so they're not cached
Lots of superficial cleanup on lltexlayer and associated classes.  Removed some unused functions and member variables as well.

and reduce unnecessary dependencies and incredibuild wedging.  Hopefully in
the long run this will reduce build time.  Also cleaned up a lot of header
file usage to conform better to the coding standard.

reviewed by james and steve.

removed ambiguous parameter "set_by_user" from many places in codebase,
renaming it to be upload_bake, which is a more accurate descriptor.
This allowed me to see several inconsistencies in how this variable was
being set - these errors were also fixed. User-visible result should be
that baked textures are not reuploaded on changing avatar sex until the
save button is pressed. primary win here is code clarity.

Code reviewed by Bigpapi.

First round of fixes for trying to fix the visual param animations

Code reviewed by Seraph

Two part fix: prevented the copying of wearable parameters to the avatar to trigger a rebake.
Then: Called wearableUpdated every time a wearable was added/removed/replaced and ensured it properly invalidated the composite

Confirmed working fix on developer machine.

Code reviewed by Seraph.

No expected functionality change; this mostly contains cosmetic cleanup.

Reviewed by: Nyx

merging in new wearable infrastructure to get a step closer to eventually supporting multiple wearables per type. Merge tested and compiles/working on linux and windows - no obvious regressions on appearance or appearance editor. Merge generated no conflicts due to being tested in fresh re-branch in avatar-pipeline/multiple-textures-12. Merge perfomed with following command:

svn merge -r 136489:136510 svn+ssh://svn.lindenlab.com/svn/linden/branches/avatar-pipeline/multiple-textures-12 .

Progress can be tracked in DEV-32551.

 -Nyx

ignore-dead-branch