msstyleEditor: download ældre versioner

• avoid showing color names instead of the RGB triplet (#185)
• allow more than 8 images, now 16, in the image view (#165)

- automatically convert image resources between straight and premultiplied alpha (#108)
- imported images are assumed to be straight alpha (as per PNG specification), and thus converted to premul. alpha.
- exported images are assumed to be premultiplied alpha and thus converted to PNG standard conforming straight alpha.
- STREAM resources (DWMxxxxxx classes) are never converted, because they already come as straight alpha.
- added a readonly edit box to the control preview (#152)

- added support for animation properties (see "animations" class).
- added search options for FILENAME and FONT.
- displaying font ID next to font names for easier cross referencing.
- added basic command line support again (feature got lost with version 2.0.0.0 rewrite).

- correctly (de)serialized margin properties. Order is supposed to be LRTB (#120).
- fixed consecutive loads & saves failing (#121).
- implemented the image hotkeys properly (#123).