Sync with Alchemy, includes much awaited lib updates for Linux

Applies ALCH-420 - Replace all invisiprims with fully transparent texture and remove dead code paths
-ARC no longer takes invisis into consideration.

Syncs some script keywords updates.

Changes all "\n" in llfloaterabout.cpp to '\n' because screw.dat

indra/plugins/CMakeLists.txt

@@ -3,16 +3,17 @@
 add_subdirectory(base_basic)
 add_subdirectory(base_media)
 add_subdirectory(filepicker)
-if (NOT LINUX)
-add_subdirectory(cef)
-endif (NOT LINUX)
 
 if (LINUX)
     add_subdirectory(gstreamer010)
 endif (LINUX)
 
+add_subdirectory(cef)
+
 if (WINDOWS OR DARWIN)
-    add_subdirectory(quicktime)
+    if(NOT WORD_SIZE EQUAL 64)
+        add_subdirectory(quicktime)
+    endif(NOT WORD_SIZE EQUAL 64)
 endif (WINDOWS OR DARWIN)
 
 add_subdirectory(example_basic)