Bump default electron version to 0.37.2
Bump default electron version to 0.37.2

Uses chrome 49

zucher/nativefier,pixel9/nativefier,gfpacheco/Nativefier,jiahaog/Nativefier,gfpacheco/Nativefier,zucher/nativefier,zucher/nativefier,jiahaog/Nativefier,pixel9/nativefier,jiahaog/Nativefier,faceair/nativefier-slack,skewedlines/Nativefier,pixel9/nativefier,faceair/nativefier-slack,gfpacheco/Nativefier,skewedlines/Nativefier,skewedlines/Nativefier