Log Message:
hugin: updated to 2018.0.0

2018.0.0:
The version 2018.0 is mainly a bug fix release and introduce some minor new features.

Several improvements for optimizer tabs:
- mark deselected images
- allow changing optimizer variables for all selected images at once
- option to ignore line cp
hugin_stacker: New tool to stack overlapping images with several averaging modes \ 
(e.g. mean, median).
Hugin: Added option to disable auto-rotation of images in control point and mask \ 
editor.
Nona, verdandi and hugin_stacker can now write BigTIFF images (for files >4 \ 
GB). The output of BigTIFF has to manually activated on the command line. It is \ 
not set automatically. (For a complete panorama in BigTIFF you will probably \ 
also need enblend/enfuse from repository. The last released version of enblend \ 
does not yet support writing BigTIFF files.)
Added expression parser to GUI: This allows to manipulate several image \ 
variables at once. (This is the same as running pto_var --set from the command \ 
line.) This can be used e.g. to prealign the images in a given setup and then \ 
run cpfind --prealigned to search control points only in overlapping images.
Add user-defined assistant and expose it in the GUI. It allows to set up \ 
different assistant strategies without the need to recompiling. Provide also \ 
some examples (scanned images, multi-row panoramas with orphaned images, \ 
single-shot panorama cameras).