update client script name to make errors more clear

Author: jescalan

README.md

@@ -33,7 +33,7 @@ Then, in your main javascript file, require it up top:
 
 ```js
 // assets/js/index.js
-require('spike-pushstate')
+require('spike-pushstate-client')
 ```
 
 That will do it! By default it will match any file with a `.html` extension, and use the pushState override on it. However, if you want it to match a different pattern, like maybe sugarml files instead, you can just pass a string with a glob matcher as such (string or array):

lib/index.js

@@ -18,7 +18,7 @@ module.exports = class PushState {
   apply (compiler) {
     if (!this.files) return
     const util = new SpikeUtil(compiler.options)
-    const tempFile = path.join(util.conf.context, 'node_modules/spike-pushstate.js')
+    const tempFile = path.join(util.conf.context, 'node_modules/spike-pushstate-client.js')
 
     compiler.plugin('make', (compilation, done) => {
       const htmlFiles = util.getSpikeOptions().files.html