Draw 3D axes in corner of screen and implement corresponding camera response to different view angles

Autosave bug fixed

Redmine issue 2155: employed PointwiseAxis in SpecularSimulation and related classes

Redmine: #2146

Redmine: #2155

Redmine: #2155

Redmine: #2155
Also changed differential evolution parameters in order to speed up
computation

Redmine: #2155

Redmine: #2155
Now PointwiseAxis::getMin(), PointwiseAxis::getMax() as
well as lowermost and uppermost boundaries correspond
to minimum/maximum coordinate values passed to the constructor

Redmine: #2155

Redmine: #2155

Redmine: #2155
Seems that it is better to have an additional overload
instead of directly exposing PointwiseAxis to users,
since it is not forseen to be used outside of SpecularSimulation.

Redmine: #2155
1. Functions for constructing axes of particular type are hidden
   in anonimous namespace
2. copying replaced with move in some places
3. axis type check improved - looking for the type as only the first
   word in the line
4. createAxis now returns a unique_ptr
5. All static string constants moved to cpp file

GUI3D Modification to zoom level for Top and Side View