1) .snk file is missing.
After fixing that:
2) ICSharpCode.SharpZipLib is missing.
Yes, these are not fatal errors that one cannot fix, but wait: there is the instruction in readme.txt:
Open Mono.Addins.sln in your IDE of choice and build the solution.
All the binaries are generated in a 'bin' subdirectory of the
No dependencies, no warnings.
Please make the solution to be buildable out-of-the-box.