Forbid shorthand a*b, request a.dot(b) or dotProduct(a,b).
Remove "virtual" from ~BasicVector3D.
Provide templated implementation for almost all methods,
  resolving issue #237.

Repair Python compilation by restoring default constructor in HomogeneousMaterial.h

(was mathematically incorrect).
Change order of compilation: basics first.

Renounce use of delegating constructors to avoid warnings from pre-C++11.
Improve comments.

Removed duplicate function names (rho, r) from BasicVector3D.

Export of OutputData in python; isgisaxs9 and mesocrystal functional test are exported to python, many corresponding changes.