WAsP Turbine Editor version 9.3.0.19

Release notes.

New features and bugs fixed since version 9.3.0.15:

1) More than one negative power is supported
2) In connection with that, the definition of derived cut-in has been changed:
   a. If entries with P=0 are specified in the beginning of the table: 
        cut-in = wind-speed entry with P=0 immediately before the first entry where power becomes non-zero.
   b. Otherwise: 
        cut-in = first wind-speed entry of the table.

New features and bugs fixed since version 8.3.0.8:

1) Incomplete performance tables - e.g. with some or all power or Ct-values missing - 
   are saved in compliance with WAsP8.3 and WAsP9 conventions. I.e. WAsP will not crash,
   but issue an ordinary exception notice in case of an attempt to open an incomplete
   turbine file. In contrast, the turbine editor can open an incomplete turbine file
   to allow the user to add the missing information and save the result as a complete
   turbine file - which can be opened and used in WAsP.

2) Company- and performance table info (like company address, and performance table 
   completion date) could not be read in some variants of .pow and .trb file formats.
   This has now been fixed.

3) Empty lines in company- and performance table info would create an error. Has been fixed.

4) Negative powers are now supported. The limit, though, is -99998 W (= -99.998 kW).

5) A bug in the separate Ct table has been fixed.