This ports the wx-widgets stream analyzer from Daala to AV1.
Currently, this supports playback, zooming, and printing bit accounting
 statistics to stdout.
The configure script does not yet build the analyzer, to compile it:
 g++ -I. examples/analyzer.cc video_reader.c ivfdec.c tools_common.c \
 libaom.a `wx-config --cppflags` `wx-config --libs` -o analyzer

Change-Id: I0e4288d52a103850b255f226f398892cc50d29e8