Resolve "As a user I want a consistent theme across the website"

Closes #12 (closed)

css framework.css

+body{
+  background-color: white;
+  color: black;
+}
+
+header{
+  background-color: white;
+  color: black;
+  display: block;
+  margin-left: auto;
+  margin-right: auto;
+  float: center;
+}