Add libv8 development dependency
Add libv8 development dependency

Locked to version 3.11.8.3, which is said to have a
binary version good for Travis.

Nikita-V/skim,flintinatux/skim,jfirebaugh/skim,appjudo/skim,Boltmade/skim,gkopylov/skim,Boltmade/skim,jfirebaugh/skim,appjudo/skim,gkopylov/skim,Nikita-V/skim,flintinatux/skim