Use angular-chart.js to draw balance chart.

src/operations/operations.html

@@ -16,6 +16,15 @@
     along with Accountant.  If not, see <http://www.gnu.org/licenses/>.
 -->
 <div>
+  <div class="row">
+    <div class="col-md-9">
+      <balance-chart
+        min-date="operationsCtrl.minDate"
+        max-date="operationsCtrl.maxDate"/>
+    </div>
+    <div class="col-md-3"></div>
+  </div>
+
   <div class="row">
     <table class="table table-striped table-condensed table-hover">
       <thead>