Fix tooltip viewport example

- Move example to correct location docs/examples/
- Move custom JS and CSS into stand-alone files
- Update headers and footers
- Copy-editing

docs/examples/tooltip-viewport/tooltip-viewport.js

@@ -0,0 +1,18 @@
+$(document).ready(function () {
+  $('.tooltip-right').tooltip({
+    placement: 'right',
+    viewport: {selector: 'body', padding: 2}
+  })
+  $('.tooltip-bottom').tooltip({
+    placement: 'bottom',
+    viewport: {selector: 'body', padding: 2}
+  })
+  $('.tooltip-viewport-right').tooltip({
+    placement: 'right',
+    viewport: {selector: '.container-viewport', padding: 2}
+  })
+  $('.tooltip-viewport-bottom').tooltip({
+    placement: 'bottom',
+    viewport: {selector: '.container-viewport', padding: 2}
+  })
+})