2.0.0-beta2

• Rename SentryAuth class to SentryAuthentication (#742)
• Client class is now final
• Fix issue with ClientBuilder: factories are not instantiated if transport is set manually (#747)
• Rename excluded_paths to in_app_exclude option to follow Unified API spec (#755)
• Add max_value_length option to trim long values during serialization (#754)
• Lower the default send_attempts to 3 (#760)
• Fix method argument name handling when Xdebug is enabled (#763)
• Add CI build under Windows with AppVeyor (#758) and fix some bugs
• Change the ErrorHandler and default integrations behavior: the handler is now a singleton,
  and it's possible to attach a number of callables as listeners for errors and exceptions (#762)
• The context_lines options changed the default to 5 and is properly applied (#743)
• Add support for "formatted messages" in captureEvent as payload (#752)
• Fix issue when capturing exceptions to remove warning when converting array args (#761)