tvOS support

Adding tvOS support includes:

• Adding new target and shared scheme for tvOS
• Updating README.md and .travis.yaml config file
• Adding crashing action to the demo app
• Adding shared scheme for tvOS example application
• Updating default logging level
• Updating Backtrace.podspec

Note: This version requires at least Backtrace-PLCrashReporter version 1.5.0

Documentation update

• Add comments in public definitions
• Add table of contents to README.md
• Rename userAttributes to attributes
• Update example projects

Add file attachments

File attachments

• Add file attachments support
• Send attachments using multipart
• Store attachment paths in CoreData
• Add file reading option .mappedIfSafe

Default attribubutes

• Add default attributes for network and Bluetooth status
• Expose attachment path in public API
• Add default attributes for:
  • guid - unique user identifier
  • error.message
  • hostaname
  • lang.name
  • lang.version
  • NFC
  • location

Handling all exceptions on macOS

• Handle crashes on macOS by BacktraceCrashExceptionApplication

Documentation

• Update documentation
• Update README.md
• Update BacktraceClientConfiguration

Tests

• Add mocks for URLSession
• Add mocks for HTTP responses
• Improve code coverage

Checking the debugger attachment

• Run CrashReporter only when the debugger is detached
• Add reporting policy
• Check if the debugger is attached

Add custom attributes

• Add support for default attributes
• Add support for user-defined attributes
• Handle saving all kind of attributes on crash-time
• Simplified library API
• Add more customization for BacktraceClient implementation