added posibility to use est_t_max for time adaptivity. The time error may now be defined as est_t_combined =sum_fac*est_t_sum + max_fac*est_t_max. Default is sum_fac=1 and max_fac=0. Thus, by default adaption is working as before. 

included new variable <lastProcessedTimestep> in AdaptInfo, in order to have the timestep which lead to current time in user program

AdaptInfo: test-cout added (could be deleted)
ConditionalEstimator: should run over all elements, but there's an error (adapts only one times)

* Faster serialization of all objects

* AdaptInfo::reset() does not set timestep to 0.0, instead it reads the parameter from init file again
* ParaReal-stuff changed

* Added ParaReal files

* New function: double AdaptInfo::getEstTSum(int index)
* New flag for problem initialization: INIT_GLOBAL_REFINES (is also set to INIT_ALL)