Add .net language binding

Added link to node.js translate

https://github.com/franciscop/translate

Include reverse proxy instructions

fix static package_data for offline mode

package_data 'static/*'  won`t include sub directories so offline mode would result in 404 for static resources under js, css, fonts

Add offline parameter

Offline usage is possible after initializing and downloading of models

Add /detect API

Add badges to the readme to display tests results and python versions

Add pip packaging

Add frontend translation timeout parameter