Adds the high level WithDebugf() context option, and associated lower
level browser and dial options for setting a protocol wire debugger.
Additionally changes the conn.Conn.Read/Write implementations to be more
efficient, using direct easyjson.{Marshal,Unmarshal} calls and logging
to debug func when available.
First, we want all of the functionality in a single package; this means
collapsing whatever is useful into the root chromedp package.
The runner package is being replaced by the Allocator interface, with a
default implementation which starts browser processes.
The client package doesn't really have a place in the new design. The
context, allocator, and browser types will handle the connection with
each browser.
Finally, the new API is context-based, hence the addition of context.go.
The tests have been modified to build and run against the new API.
- Refactored API calls to be cleaner
- Changed types that shoudn't be exported to not-exported
- Updated examples with API changes
- Added unit test for Title action
