Added problemdump.cpp
Added Segments functions
Added missing features link
not log writing out every slice
ground truth optional
Restructure HDF5 reader. Added ROI option
origin and target section index
Added reverse mapping to ProblemConfiguration
Write out constraints
Imageprocessing commit
Write out costs seperately
Do not use the objective for the problem dump
bugfix: end segment constraints of last section should not be written when dumping the problem

Rationale: The end segment constraints will be taken care of when asking
for the next problem dump starting at the previously last section.
added binary solve_subproblems and StreamProblemReader
changed decomposition nomenclature (Problems -> Subproblems)
updated util
added SubproblemsSolver and added it to the pipeline in
solve_subproblems
added SubsolutionsWriter
added subproblem protocol description and support for multiple subproblems
Added XCB cmake find to make it compatible with Ubuntu 11.10