emit notes for compile warning as well
[refactor] introduce Parser#getContent()
add failing test
emit compile warning when files with same basenames (and with identical contents) are loaded from different paths
Merge branch 'kazuho/experiments/detect-identical-files'
Merge branch 'master' into kazuho/experiments/npm-support
add failing test
emit warning if npm module (with the same name) is loaded from different locations