Remove unuseful functiond and fix pages getter

Pages are now stored in an object.
Don't scroll to page if the page hasn't not change

Verify that the current page has change before scroll to the new current page.
Prepare integration of the web client into OSGi

When packaging an application as OSGi bundle with out sbt build script,
we expect directories to be organized in a certain manner. Stuffs in the
src/main/resources directory are automatically add to the jar file,
which makes it a good candidate for the client code.
Track registered web applications
Transform `blue-web` into web application

Create a simple web application that only serves static content that is
in the \BlueLaTeX webapp bundle. This application is mounted on the
'/web' URL and looks for files in the 'webapp' directory.

Remove
Adapt the web client to the new achitecture