Incorporate WRAPLOW macro into non-highbitdepth tx

Incorporates the WRAPLOW macro into the non-highbitdepth transforms
to aid hardware verification between a software C model and an
intended hardware implementation though the use of the configure
options: --enable-experimental --enable-emulate-hardware.
Note that to avoid further discrepancies between the sse/sse2
implementations of the transforms and the C implementation, when the
emulate hardware option is invoked, we also disable sse/sse2/etc.

Also incudes some minor cleanups/renaming etc.

Change-Id: Ib864d8493313927d429cce402982f1c8e45b3287
diff --git a/configure b/configure
index 7b9c211..3ed976c 100755
--- a/configure
+++ b/configure
@@ -281,7 +281,7 @@
     spatial_svc
     vp9_temporal_denoising
     fp_mb_stats
-    emulate_hardware_highbitdepth
+    emulate_hardware
 "
 CONFIG_LIST="
     external_build