Upgrade Babel to 2.3.4
Upgrade Babel to 2.3.4

dstufft/warehouse,karan/warehouse,pypa/warehouse,alex/warehouse,pypa/warehouse,alex/warehouse,alex/warehouse,dstufft/warehouse,dstufft/warehouse,dstufft/warehouse,karan/warehouse,wlonk/warehouse,pypa/warehouse,karan/warehouse,karan/warehouse,karan/warehouse,alex/warehouse,alex/warehouse,wlonk/warehouse,pypa/warehouse,wlonk/warehouse