Program HDF5Statitics

Main features:
- interaction with input file is performed through a nomfich file (input file 
indicated in IN_MODEL);
- input file:
	- block for each HDF5 containing data (order is irrelevant): 
		<BeginHDF5File> 
		NAME : ... (path to HDF5 file) 
		<EndHDF5File>
	- definition of time window for statistics calculation:
		START_TIME : ...
		END_TIME : ... (yyyy mm dd hh mm ss)
	- statistical method:
		METHOD_STATISTIC : ... (1 = Values3DStats3D, 3 = Values2DStats2D)
	- type of statistics (in time): (0 = not chosen, 1 = chosen)
		GLOBAL_STATISTIC  : 1/0 
		DAILY_STATISTIC   : 1/0
		MONTHLY_STATISTIC : 1/0 (one has to be chosen at least)
	- block of parameters that are object of statistics (may be several):
		<BeginParameter>
		HDF_GROUP : ... (path in HDF5 file to data)
		PROPERTY : ... (parameter name)
		<EndParameter>
	- name of output file (HDF5):
		OUTPUTFILENAME : ...
	- if files are 3D:
		3D_HDF5 : 0/1 (1 = 3D)
	- the map item name in HDF5 file:
		HDF5_MAP_ITEM : ...
	- option to calculate also geometric mean (just for non negative parameters):
		GEOMETRIC_MEAN : 1/0 
	(for this option null values are considered unity because of calculation needs,
	this proceadure is common for the calculation of the geometric mean of 
	coliforms but may not be adequate for other parameters) 	

Some notes:
- when performing daily/monthly statistics program does not require that day/month 
  is complete, day/month is defined by calendar day/month;
- the 0 hour data is accounted for statitisc of the previous and next day;
- the first 0 hour data of a month (first day) is accounted for statistic in previous
  and next month;
- program cannot calculate statistics for both 2D and 3D parameters in same run.
