docs: fix screenshots

Gruntfile.js

@@ -75,7 +75,7 @@ module.exports = function(grunt) {
 					{
 						expand: true,
 						cwd: 'src/images/',
-						src: ['*.ico'],
+						src: ['*.*'],
 						dest: 'dist/',
 						filter: 'isFile'
 					},
@@ -106,7 +106,7 @@ module.exports = function(grunt) {
 					{
 						expand: true,
 						cwd: 'src/images/',
-						src: ['*.ico'],
+						src: ['*.*'],
 						dest: 'dist/',
 						filter: 'isFile'
 					},

README.md

@@ -5,7 +5,7 @@ Ethereum Network Stats with POA and POW support
 This is a visual interface for tracking proof-of-work ("mainnet") and proof-of-authority ("testnet") network status. It uses WebSockets to receive stats from running nodes and output them through an angular interface. It is the front-end implementation for [netstats-client](https://github.com/goerli/netstats-client).
 
 ## Proof-of-Authority
-![Screenshot](src/images/screenshot-v0.1.0.png "Screenshot")
+![Screenshot](src/images/screenshot-poa.png "Screenshot POA")
 
 #### Prerequisite
 * node
@@ -40,7 +40,7 @@ Find the interface at http://localhost:3000
 
 ## Proof-of-Work (Legacy)
 
-![Screenshot](src/images/screenshot-v0.0.6.png "Screenshot")
+![Screenshot](src/images/screenshot-pow.png "Screenshot POW")
 
 Same as above, just run the `pow` build task in Grunt.