replacing umlaute and fixing address in headers Haldeneggsteig -> Universitaetsstrasse

Signed-off-by: Reto Achermann <reto.achermann@inf.ethz.ch>

libcollections: Extend the list implementation with a function to remove all
items of the list that match a given predicate.

Moreover, convert file to use unix-style line ending instead of windows-style.

collections: Extend list implementation with a function to remove a specific
element and a function to add an element at the tail of the list.

Additionally, refactor files to compy to our coding standards.

Refactored libcollections.a to prefix all exported functions and data
types with collections_ to prevent namespace pollution. Many
application programs have their own functions named list_* and hash_*
(e.g. PostgreSQL).

Initial version of public stable barrelfish repository.