update ex3
Solution for ex1.
Solution for ex2.
Merge pull request #3 from wuschel91/master

ex1 + ex2 solutions
added solution files of ex1 and ex2
Merge pull request #4 from clauslang/master

added solution files of ex1 and ex2
Update README.md
Update README.md
added directories and files (ex3)
Merge pull request #5 from RamonaOttow/master

added directories and files (ex3)
Update README.md
added my homeworks
Merge pull request #6 from HennigKai/master

added my homeworks
Felix Simon - ex1 solution
Felix Simon - ex2 solution
committing ex1 and ex2 as part of ex3
Merge branch 'master' of https://github.com/mattmilten/appfs
Merge pull request #7 from apfelix/master

Pull Request No. 2
ex3 comes from greiner-petter
Merge pull request #8 from AndreG-P/master

ex3 comes from greiner-petter