STORM-151 : Modify llkdu cmake to point explicitely to static libs, simplify make (in progress, don't pull yet)

STORM-151 : suppress the linux64 ref in install.xml and attempt to fix llkdumem.cpp linux compile issue

SH-412 -- fix the way that redraws happen to eliminate flickering on resize -- patch from davep and seraph, I'm just applying it.

STORM-535 FIXED PLEASE allow adjustable transparency of "Nearby Chat" window, Chat History and Chat "Toasts" in Viewer 2.0!

- Added to the settings.xml values of transparency for active and inactive floaters

- Added three members to the LLFloater. These members store current transparency of floater, transparency of active and inactive floaters.

- Added callbacks that update transparency value of active and inactive floater. Also in these callbacks value of current floater transparency updated.

- In panel preferences advanced added two spinners: transparency of active floaters and inactive ones. See screenshot.

fixed logic so that ignore consistently means *don't show* the notification
the ignore settings still store "show the notification if true" values

STORM-105 : takes Vadim's comments into account, clean up use of static globals and magic strings, enforce naming conventions

reverted to old sense where ignore setting of notifications has meaning true=show false=ignore
reviewed by Callum