refactor[core]: use webpack-dev-server now (#355)

* bump deps: update vue-splitpane version

* refactor[chore]: use webpack-dev-serve build

* perf:settings

* doc: uodate readme

src/vendor/Export2Excel.js

@@ -1,6 +1,6 @@
 /* eslint-disable */
 require('script-loader!file-saver');
-require('script-loader!vendor/Blob');
+require('script-loader!@/vendor/Blob');
 import XLSX from 'xlsx'
 
 function generateArray(table) {