Disable examples from theora build
Work around arm64 iOS Safari JIT hang in Vorbis decoding

With updated emscripten 1.8.2 and tweaking the optimization down to -O1
we get functional Vorbis decoding on arm64 iOS devices.

May or may not fix the Safari 6.0 hang, unable to test that right now.

Also updated readme.md with some updates.
Merge pull request #28 from maikmerten/master

Additional Flash stuff
Reenable -O2 optimization with Relooper explicitly disabled

Reduces ogv.js file size dramatically compared to -O1 but still
decodes video slower... but doesn't hang on iOS arm64.
Turn relooper back on, but enable fastcomp

This boosts performance back up to reasonable levels while working around
the arm64 iOS JIT hang in Vorbis decoding. Need to actually install the
new backend of course:

  https://github.com/kripken/emscripten/wiki/LLVM-Backend
always generate stereo PCM for the Flash audio fallback (upconvert from mono if necessary)