adjusted with files created from read_open() instead of read_open_file()
added syncTimeStep to get the correct time step from f->current_step
minor change regarding gCurrentTimeStep
the nagetive infinity is -DBL_MAX rather than DBL_MIN
added code to handle read_open() results for blocks
get_method needs to be called for free() too
fixed get_method to handle the *_free() function
fixed some memory leak
minor fix
change to the right order ( meta, index, LoB and OD) for offsets, and adapt query engine to it