Add go-pdfium to related projects (bblanchon#71)

Add go-pdfium to related projects (bblanchon#71)

Update WASM patch

Add table of NuGet packages

NuGet: Fixing targets files for Android and Win32 (bblanchon#67)

README: add contributors section

Add a NuGet build job (issue bblanchon#65)

Packages are not pushed to nuget.org yet, but they are available in the build artifacts.

Add PDFtoImage to the project list (PR bblanchon#64)

Added a GitHub repository to the list of projects using these PDFium builds.

Align Windows package's layout with the others (fixes bblanchon#17)

(x86|x64|arm64)/bin/pdfium.dll => bin/pdfium.dll
(x86|x64|arm64)/lib/pdfium.dll.lib => lib/pdfium.dll.lib

Fix iOS patch