SH-2242 FXAA support instead of unreliable multisample textures (done here because it's a smaller change than integrating glVertexAttrib with FSAA pipe).  Shader integration with LLDynamicTexture subclasses.

SH-2238, SH-2223, SH-SH-2242 glVertexAttrib throughout main render pipeline complete, preview renders and debug displays still pending.  Also fixed a render glitch and a crash (JIRAs listed).

Changed the default to use low LOD for single hull generation, will fall back to medium or high if not present.

paypal had a verisign -2 CA cert, and the new trust list only includes -3.

Also, disable use of the system cert store.  Just use our list.

also allow right clip to copy url from disabled address bar

changed browser id back to a string so it accepts malformed uuid strings
coming from webkit - "{uuid}" instead of "uuid"

SH-2181 Fix for alpha flickering when basic shaders enabled (don't use glAlphaFunc when shaders are available).

Reviewed by Leslie

the trust chain around a bit.

EXP-1054 FIX Entering search term in search box in Viewer UI does not produce search results if search window is already open
use new parameters when opening existing floater

SH-1990 Fix for redundantly applying some color scaling to sky and water (also add some snazzy specular bloom from the sun)