Update nan to ^1.8 to support io.js 2.0
Update nan to ^1.8 to support io.js 2.0

gdi2290/fsevents,pmq20/fsevents,pmq20/fsevents,mauritslamers/fsevents-bin,xzyfer/fsevents,eccenca/fsevents,gdi2290/fsevents,mauritslamers/fsevents-bin,strongloop/fsevents,pmq20/fsevents,gdi2290/fsevents,strongloop/fsevents,xzyfer/fsevents,eccenca/fsevents,strongloop/fsevents,strongloop/fsevents,xzyfer/fsevents,eccenca/fsevents