call _init() in modules at init time. closes #1268
Merge branch 'master' of github.com:JuliaLang/julia into jb/module_init
rename _init to __init__
better module initialization order: init inner modules after outer modules
are complete and initialized.
fix #5963
Revert "fix #5963"

This reverts commit df0921b50ca50a27fe8495935810105c41476043.
add NEWS for module init, and clean up Base initializer
Merge pull request #5960 from JuliaLang/jb/module_init

call __init__() in modules at init time