Resolve "Remove wrappers"

This MR removes the following wrappers:

• AlignWrapper
• CyclotronWrapper
• MultipoleWrapper
• SBendWrapper
• CorrectorWrapper
• RBendWrapper

In addition, there are two bugfixes:

• The Pointer assignment operator results no longer in a segmentation fault when the object is assigned to itself.
• The Offset member pointer geometry_m was not initialised in some cases.

The MR further adds the file header description of all files that were touched.

Closes #240 (closed)