build: i18n: style changes for https://github.com/joyent/node/pull/7719#discussion_r16965683
build: i18n: style changes: add iculslocs.cpp back to cpplint, change non-const reference to pointer. see https://github.com/joyent/node/pull/7719#discussion_r16965638
build: i18n: docs: remove FIXMEs, point to https://github.com/joyent/node/wiki/Intl