added bignumber.js to js.qrc

libjsqrc/js.qrc

@@ -1,6 +1,7 @@
 <RCC>
     <qresource prefix="/js">
         <file>es6-promise-2.0.0.js</file>
+        <file>bignumber.min.js</file>
         <file>setup.js</file>
         <file alias="webthree.js">ethereumjs/dist/ethereum.js</file>
     </qresource>

libqwebthree/QWebThree.h

@@ -85,6 +85,7 @@ private:
 	_frame->addToJavaScriptWindowObject("_web3", qweb, QWebFrame::ScriptOwnership); \
 	_frame->addToJavaScriptWindowObject("env", _env, QWebFrame::QtOwnership); \
 	_frame->evaluateJavaScript(contentsOfQResource(":/js/es6-promise-2.0.0.js")); \
+	_frame->evaluateJavaScript(contentsOfQResource(":/js/bignumber.min.js")); \
 	_frame->evaluateJavaScript(contentsOfQResource(":/js/webthree.js")); \
 	_frame->evaluateJavaScript(contentsOfQResource(":/js/setup.js")); \
 }