code review

Some code review done, with changes.

FEATURE_C_POLSNOM_EVALUE_SPLINE_GLPK_CHECK_ALL_SOLUTIONS
With this feature all (defined) solutions will be checked (even
infeasible, no feasible and unbounded). (don't know if feature is usefull)
Merge branch 'master' into develop
Minor bugfix

Minor bugfix in test tImageSearchData.cpp: checkPoint() rounded
all negativ values to 0.