08-03.12 Improvement of PG file options

New Import and export options have been included. The import options are from simple text file and corresponds to the format that is created by the correspondent export option. Note that for different separators may be valid to separate variable number. The default separator is comma (,) the second is semicolon (;) the third is tab (TAB) and the forth is space ( ). Numbers could be specified as floating point numbers using the decimal point (.). Records are separated by new lines (CR and NL). The First value on each line could be a date specified as 1985-01-01 12:00. If the data is omitted then it will be estimated from the specified start data and the specified time interval in the dialog window.