Bug 724533 - Make ICU build with Mozilla build for Windows. r=gps

--HG--
rename : intl/icu/source/config/mh-cygwin-msvc => intl/icu/source/config/mh-msys-msvc
Bug 855732 - getTextBeforeOffset for word boundaries: evolving, r=tbsaunde
Bug 839516 - Reloading the selected tab should remove transient notification bars. r=gavin