Make library compatible with browserify

[ppmathis]

The library should be atleast compatible with browserify, so that it can be easily used for browser applications aswell. Idea taken from @zohead, as mentioned within gesellix/keepass-node#4

[sgarcia-dev]

So is there any kind of workaround for this? I'm trying to build a web app with this but browserify returns a:

Error: Cannot find module '../../build/Release/kpion' from 'C:\Users\sgarcia\code\my-keepass\node_modules\keepass.io\lib\Utility'

I haven't been able to find the "build" folder anywhere, is there a workaround to this?