Add version of selenium-grid-extras to nav bar html.
Fix formatting in pom.xml for my changes.
Adding test for Version.
Merge branch 'display_version' of https://github.com/smccarthy/Selenium-Grid-Extras into smccarthy-display_version

Conflicts:
	SeleniumGridExtras/src/main/java/com/groupon/seleniumgridextras/homepage/HtmlNodeRenderer.java
Merge branch 'smccarthy-display_version'