Compiler: refine console configuration levels and share with plugins

[chqrlie]

• add -q and --quiet c2c option to disable console.log messages
• add console.setQuiet to disable console.log messages
• collect console configuration in a Config object
• pass console configuration to plugins
• change quiet flag in tester from -t to -q (for consistency)
• make Makefile rebuild targets and examples less verbose

[bvdberg]

For tooling wrapping the compiler this makes it harder to automate tasks. I prefer that output is always the same, so that tooling can easily grep stuff.

[chqrlie]

Fair enough... How about a command line option --terse that prevents the output of building xxx?

[bvdberg]

I've never seen 'terse' used, maybe use 'quiet'. In console, we already check console.debug() for some flag. Maybe this is in line with that, but it also suppresses console.log? Then we only need to check in one place.

[chqrlie]

I've never seen 'terse' used, maybe use 'quiet'. In console, we already check console.debug() for some flag. Maybe this is in line with that, but it also suppresses console.log? Then we only need to check in one place.

Actually the tester uses -t, described as terse mode...

I changed the flag to -q / --quiet and grouped the console configuration flags in a console.Config object shared with the plugins. The color customization could be stored there too later.