0.10.0-beta.1

• Basic support for IE8 browser (@SevInf).
  This change required a large rewrite of the all client-side
  scripts which can cause some breaking changes. For example,
  bounds of a capture region are calculated more precisely now.
  You'll probably need to re-gather your screenshots.
• Calibration now correctly works in IE9 (@SevInf).
• Added an option referenceImageAbsence (@hatroman).
  This option allows to change default behaviour of the tests
  to produce the warning if there is no reference image.
  Default behaviour is still the test failure.
• Re-add tolerance setting, which now sets max allowed
  CIEDE2000 difference between image colors. It is now
  configurable on 3 levels:
  • tolerance option in config
  • setTolerance method for a suite
  • optional parameter to capture method:
    javascript suite.capture('name', {tolerance: 20}, function() {});
• Programmatic API method buildDiff is now deprecated: it
  has access only to global tolerance, so diff it produces might not show
  exactly what caused test to fail. Method is kept for backward compatibility,
  but users of a programmatic API now encouraged to use saveDiffTo method of
  test result (passed to reporter) instead.
• Warn if coverage for CSS file cannot be calculated due to
  same-origin policy (@SevInf)