Added the Pattern recognition seminar.
Added the Artificial intelligence 2 seminar.
Added a a web interface for choosing optional subjects.
Added package.html to .gitignore.
Added LPP.
Removed creation date as it may not be accurate.
Added toy RSA.
Added a Programming Basics 2 homework.
Added bouncing balls.
Merge branch 'balls'
Merge branch 'lpp'
Merge branch 'op2'
Merge branch 'optional'
Merge branch 'rsa'
Merge branch 'rv'
Merge branch 'ui2'