Preparation for release 0.1.0

[lukas-h]

CC @armantorkzaban

• once Port booleanWithin and its tests #130, Port booleanOverlap and its tests #132 is fully implemented
• with the improvements to the core Decide if all functions should always return normalized coordinates (within ±90deg/±180deg range) #46, toMap() methods return maps that include bbox and id with null value #128

[lukas-h]

• polygon clipping functions from Polygon clipping package conversion #170
• new geotypes library
• bump version number