minor fix
add .bufferWhile
add .withDefault
add .bufferBy
fix .log
flushOnEnd option for buffering methods
docs on flushOnEnd & clarification on synchronous calls
add .bufferWhileBy
docs
expose Emitter (fix #25)
add .zip
arrays support for .zip
docs
0.4.1
Merge branch 'master' into gh-pages

* master:
  0.4.1
  docs
  arrays support for .zip
  add .zip
  expose Emitter (fix #25)
  docs
  add .bufferWhileBy
  docs on flushOnEnd & clarification on synchronous calls
  flushOnEnd option for buffering methods
  fix .log
  add .bufferBy
  add .withDefault
  add .bufferWhile
  minor fix