ruby: improve 'Setup:' section of help message
ruby: improve 'Setup:' section in help message
ruby: fix desc of 'up' action
Merge branch 'refactor_messages' into ruby
ruby: tweak spaces in navi message
ruby: refactor 'NaviAction#navi_for_newbie()' to use here document
ruby: simplify 'Step1' in navi message
ruby: more simplify 'Step1' in navi message
ruby: change indent depth of 'Step2' and 'Step3' in navi message
ruby: change navi message to concat all steps
ruby: tweak navi message
ruby: add 'Overview' section into navi message
ruby: refactor navi message
ruby: fix 'navi' action to work even when $SKIMA_COMMAND is not set
ruby: rename 'How to setup' to 'Quick Start'
ruby: rename 'navi' action into 'intro'
ruby: change 'help' message to remove 'Setup:' section
ruby: change condition to determine defalt action name
ruby: change 'intro' action to print message into stdout instead of stderr
ruby: update test script