easy js execution

[knobik]

I done goofed and didnt attach an easy execution methods to the framework. With this code you can easly do

app.ExecJS("console.log('test')")

or

app.GetEngine().Eval("console.log('test')")

to execute JS from golang.

[Luberry]

it would be nice to get this merged asap, i have a fork with it and another fix running since the master branch is broken right now.

[melbahja]

Hey,

Can you remove go.mod and go.sum from your PR.

thanks