Add Google Analytics tracking code

https://www.pivotaltracker.com/story/show/74557868

[Delivers #74557868]
Change "Vessel Assist" to "Pilot Planner"

https://www.pivotaltracker.com/story/show/74507118

[#74507118]
Merge pull request #5 from sealevelresearch/change-app-title

Change "Vessel Assist" to "Pilot Planner"
Merge pull request #4 from sealevelresearch/add-google-analytics

Add Google Analytics tracking code