Add log_info method, documentation and syntax improvements.
Add log_info method, documentation and syntax improvements.

tlunter/oboe-ruby,tlunter/oboe-ruby,boyang-li/oboe-ruby,appneta/ruby-traceview,boyang-li/oboe-ruby,appneta/ruby-traceview,tlunter/oboe-ruby,tlunter/oboe-ruby,boyang-li/oboe-ruby,boyang-li/oboe-ruby,appneta/ruby-traceview,appneta/ruby-traceview