Add new handlers and new serialized event types

- Change data format to v1.1 and replace ad-hoc protocol description
  with BNF
- Add windowSizeHandler and pageScrollHandler.
- Change POST data from urlparsed to raw.
- Move buffer's functionality into transport.
- Add browser (long-term id) and session (short, temporary) id to
  tracker.
- Add cookie support to tracker.
- Add header inspection to 'serve' task.
- Move time difference logic to a common place (state.js).
- Add unused mdn-wheel shim and unused mouse wheel handler.
- Fix/converge tests.
- Normalize naming in app.js (windowAT -> algernonTrap and co.).
- Remove unnecessary CSS definitions (in app).
- Remove rawBuffer, that was for debug only.
- Replace vim-swap rule in .gitignore to ignore '.swp'.
Add marker feature

- Add triggerable marker (and its handler).
- Change CI -> AT in constants.
- Add buffer serialization tests.
- Fix unit test basics / invocation.
- Change constant names to variables.
- Move handlers to local variables.
- Fix getDT for timeStamps with microseconds resolution.
- Fix scroll / windowSize initialization in state.
Replace/extend mouseMove event serialization

- Fix IE8 preventDefault() bug (refix).
- Replace short/long move with full event-data serialization.
- Add button number serialization to event stream.
Enable cross domain tracker

- Change content type from "application/octet-stream" to "text/plain"
- Move extra "X-*" headers to data (as a header).
- Remove data-format version dependency from test cases.
Add optional idleTimeout feature

- Also move sessionID handling out a "layer" to preserve its value
  throughout a real page-load-unload session.
Fix IE9 setRequestHeader on XDomainRequest bug

- Fix send() arguments in examples and
- Remove some unnecessary, already commented code fragments.