Removed unnecessary siteURL variable

Moved siteTitel into Meteor.startup() for access throughout the client.
Set Meteor.absoluteUrl() default rootUrl. Removed siteTitle in favour of
absoluteUrl().
Updated permalinks

Removed custom function in favour of iron:router's urlFor
Cleaned up routes, wait for ready()

Removed unnecessary extra subscriptions and SEO data. Used client-side
siteTitle var for SEO titles. Wait for ready() to avoid data() undefined
notices.
Fixed menu icon positioning