IRF mosfets table: initial commit of the IRF download.

source: http://ec.irf.com/v6/en/US/adirect/ir;jsessionid=65127ACF1E0816533B98DA6DC21CDEFF?cmd=eneNavigation&No=0&N=0+4294841672&numRecs=844
	clicked the 'Download Spreadsheet' link
	and converted xls to fods
IRF mosfets table: converted numbers from strings to floats.

According to:
http://www.ryananddebi.com/2009/11/29/remove-apostrophes-before-numbers-in-openoffice-calc/
A new spreadsheet for AC power, voltage and current calculations.