Version 0.4.11

• MAINT #115: install numpy during installation if it is not already installed.
• MAINT #124: add section on what to cite to the readme file.
• MAINT via #127: speed improvement for neigborhood generation of integer hyperparameters.
• FIX: Neighborhood of an integer hyperparameter does no longer contain duplicate values.
• FIX #117: Fix sampling of OrCondition.
• FIX #119: Allow sampling of multiple quantized integers.
• FIX via #118: Fix error message.