added jsonscript-proxy to implementations

Author: epoberezkin

IMPLEMENTATIONS.md

@@ -2,4 +2,6 @@
 
 [jsonscript-js](https://github.com/JSONScript/jsonscript-js) - JSONScript interpreter for nodejs
 
-[jsonscript-express](https://github.com/JSONScript/jsonscript-express) - express 4 middleware/route-handler evaluating JSONScript using existing express app routes.
+[jsonscript-express](https://github.com/JSONScript/jsonscript-express) - express 4 middleware/route-handler for scripted processing of existing express app routes.
+
+[jsonscript-proxy](https://github.com/JSONScript/jsonscript-proxy) - proxy server for scripted processing of other existing services.

README.md

@@ -83,7 +83,9 @@ See [Schema](https://github.com/JSONScript/jsonscript/blob/master/SCHEMA.md) for
 
 JSONScript interpreter for node-js: [jsonscript-js](https://github.com/epoberezkin/jsonscript-js)
 
-Express 4 middleware/route-handler: [jsonscript-express](https://github.com/JSONScript/jsonscript-express) (it supports evaluating JSONScript using existing express app routes)
+Express 4 middleware/route-handler: [jsonscript-express](https://github.com/JSONScript/jsonscript-express) (it supports scripted processing of existing express app routes)
+
+Proxy server: [jsonscript-proxy](https://github.com/JSONScript/jsonscript-proxy) (it supports scripted processing of other existing services).
 
 
 ## License