layers: Rename Layer/library/json files for consistency

Renamed layers from (for example) xxx_DrawState to xxx_draw_state
Renamed JSON files
Renamed libraries
Renamed object_track.* to object_tracker.*
Renamed apidump.h to api_dump.h
Renamed screen_shot layer to screenshot
Renamed APIDump layer settings file options to ApiDump
Bug fixes here and there from prior renames
diff --git a/buildAndroid/android-generate.sh b/buildAndroid/android-generate.sh
index e3e59e9..c8fda26 100755
--- a/buildAndroid/android-generate.sh
+++ b/buildAndroid/android-generate.sh
@@ -1,6 +1,7 @@
 #!/bin/bash
 
 # Copyright 2015 The Android Open Source Project
+# Copyright (C) 2015 Valve Corporation
 
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
@@ -21,8 +22,8 @@
 python ../vk_helper.py --gen_enum_string_helper ../include/vulkan/vulkan.h --abs_out_dir generated
 python ../vk_helper.py --gen_struct_wrappers ../include/vulkan/vulkan.h --abs_out_dir generated
 
-python ../vk-layer-generate.py Generic ../include/vulkan/vulkan.h > generated/generic_layer.cpp
-python ../vk-layer-generate.py APIDump ../include/vulkan/vulkan.h > generated/api_dump.cpp
-python ../vk-layer-generate.py ObjectTracker ../include/vulkan/vulkan.h > generated/object_track.cpp
-python ../vk-layer-generate.py Threading ../include/vulkan/vulkan.h > generated/threading.cpp
+python ../vk-layer-generate.py generic ../include/vulkan/vulkan.h > generated/generic_layer.cpp
+python ../vk-layer-generate.py api_dump ../include/vulkan/vulkan.h > generated/api_dump.cpp
+python ../vk-layer-generate.py object_tracker ../include/vulkan/vulkan.h > generated/object_tracker.cpp
+python ../vk-layer-generate.py threading ../include/vulkan/vulkan.h > generated/threading.cpp