Fixed the return value of the GetOfficeExePath, this should be null s…

…o it's clear the file hasn't been found.

Fixed a log error, and made the ClipboardHotkey optional.

Fix capturing Maximised windows.

Removed old Windows 8 logic, which caused greenshot#403 (which is a v…

…ery unlucky issue number LOL)

This should actually make Greenshot a tiny bit faster and use less resources, but I am not 100% sure about the effects as some windows still seem to have the window class for Windows 8.

Some left over fixes for the move to Dapplo.Windows, also updated dep…

…endencies.

Removed copying all the dependencies for every plugin, this should fix …

…greenshot#413.

Bugfix crop selection scaling greenshot#404 (greenshot#407)

Disable scaling for horizontal and vertical crop modes.

Fixed an issue with the adorner size, which stayed on 0, so it wasn't…

… visible.

Refactoring to use Dapplo.Windows (greenshot#398)

* Removed a LOT of the native "Win32" invokes in favor of Dapplo.Windows which was created mainly for Greenshot.
* Changed all usages of Point, Rectangle, RectangleF, Size to the Native versions of those from Dapplo.Windows.Common.
* Small fix for the OCR text feature.

Solved the clipboard loading for the DIB file format too, this is rel…

…ated to greenshot#396