solves a variety of problems that gcc (mainly the c++11 as default)
throws at us.

BOOST_MESSAGE has been obsolete since boost 1.34 (2007). So after 10 years, we
can finally get rid of it...

The old and the new version have both been applied to
roughly 200 real world minimization problems (minimizing energy
function to detect membranes in QMEANBrane). The differences
are marginal and within the expected range, since the
internal SVD algorithm in eigen has changed.

Andreas Schenk authored 11 years ago and BIOPZ-Johner Niklaus committed 10 years ago

patch submitted by Mark Livingstone

wrong branch, big sorry

This reverts commit e77d08a6.

patch submitted by Mark Livingstone

avoid ambiguous implicit conversions

- replaced boundary check in operator[] with assert
- replaced int data array with int variables (x,y,z)
- moved some methods to header to allow inlining
- used boost operator for operator implementations
- exported x,y,z members to python

changed unit tests for image handle to reflect changes in observer, which now retains an internal reference to the observed image

changed data viewer to delete on close

The data observer now stores an image handle instead of a data reference.
this means that no external image handle has to be stored to keep a data
viewer open. As a consequence the data viewer window gets deleted, once it
is closed to allow deallocation of the image memory if necessary.
A guarded QPointer<DataViewer> in the proxy prevents access to the
deleted DataViewer from python.

These changes will allow further downstream refactoring of the ImageHandle
and DataViewer (i.e. merge of Data and ImageHandle classes and use of
the full ImageHandle interface in the DataViewer)

This change simplifies downstream refactoring of Data and ImageHandle