Logging improvements

[ianfixes]

Highlights from CHANGELOG.md

• Using new logging class to remove arbitrary whitespace placement in favor of explicit functionality for adjusting indentation levels.
• See CHANGELOG.md for more

TODO:

• Output errors to stderr #321

Issues Fixed

• Fixes add support to report size of compiled sketch #14

[hlovdal]

The failing builds are due to stale old references to plain inform_multiline as opposed to new @log.inform_multiline.

exe/arduino_ci.rb
362:    return inform_multiline("Wildcard architecture in library.properties, using configured platforms") do
373:    return inform_multiline("Default config, platforms matching architectures in library.properties") do
382:  inform_multiline("Configured platforms that match architectures in library.properties") do

[ianfixes]

Yup, I'm just making a lot of local edits and pushing up stuff to my branch that (for now) I expect to have failures. Lots of areas being cleaned up! All the puts in the testing portion of that file need to be replaced with @log.iputs as well, which is in progress