New component unpivot and output bug fix

The new component tFileExcelSheetInputUnpivot provides the feature to unpivot (or normalize) data provided in a variable number of columns. Please refer to the documentation of tFileExcelSheetInput.

tFileExcelSheetInput has now the option to tolerant find a sheet even if it is not exactly named as expected.
Spaces, - _ and case will be ignored optionally

tFileExcelSheetOutput: set data formats has been fixed.