bdf2 pointer changed, progress
weakform reuse progress
progress
bdf2 refactored
control of matrix recalculation implemented.
Works for higher order bdf.
For fixed step 2x speedup (probably should be improved), for adaptive cca 20% (due to keeping one weakform and calling set_ext on it)
times may differ for other examples
new calculation chack introduced. All checks(invoking QMessageBox) cause fail! Maybe due to threads.
fix
instead of qMessageBox using error print in log view
fixed NewtonSolverAgros steps assert
fixed ";" in Value
fixed particle tracing refresh
fixed internal surface integrals
fixed script generator - material refinements
fixed loops in preprocessor after running script
Merge branch 'master' of git://github.com/hpfem/agros2d into bem

Conflicts:
	agros2d-library/hermes2d/solver.cpp
exceptions catched at one place in problem, solveActionCatchException() removed
removed try-catch blocks with no effect
synced with hermes
sync with hermes
minor newton output fix