Better logging, tracing

[dd86k]

Right now, trace logs are only written to stdout, logging is very minimal, and somewhat messy.

Issues:

1. Alicedbg does not offer logging facilities.
2. Both the debugger and dumper module lack proper logging formats when it comes to debugging either apps.
3. Trace builds spam stdout, reducing visibility when debugging.
4. A little difficult to differentiate between debugger output from debuggee output.

Options:

1. Provide logging callbacks for Issue 1.
2. Have tracing output to a alicedbg.log file for Issue 3.

Solutions:

• Shell: Debug events can be formatted [adbg] event: message.
  • Fixes Issue 2 and 4.
• Shell: Debugger messages (verbose) can be formatted [adbg] debugger: message.
  • Fixes Issue 2 and 4.
• Dumper: Can be formatted dumper: message.
  • Fixes Issue 2.
• Trace output can be written to alicedbg.log and/or alicedump.log.
  • Fixes Issue 3.