Update lib/router/Response.js

Fix reference to path in sendFile.
Merge branch 'master' of https://github.com/appjs/appjs
cef_dll_wrapper.a to cef_dll_wrapper.node on line 289
fix to non-lowercase header keys
fix lookup of json body parsing
Fixed an issue where DialogClosed() is NOT invoked for an OpenDialog or SaveDialog on MAC
Merge pull request #339 from jetsonsystems/master

Fixes to JSON body parsing in built in router, and dialogClose not properly cleaning on on open/save dialog.