Added build script to install Nuget deps.
Added build script to install Nuget deps.

ktopouzi/CppSharp,mohtamohit/CppSharp,zillemarco/CppSharp,mono/CppSharp,genuinelucifer/CppSharp,inordertotest/CppSharp,mono/CppSharp,ddobrev/CppSharp,mohtamohit/CppSharp,ktopouzi/CppSharp,ktopouzi/CppSharp,u255436/CppSharp,u255436/CppSharp,ddobrev/CppSharp,ddobrev/CppSharp,ddobrev/CppSharp,u255436/CppSharp,mono/CppSharp,zillemarco/CppSharp,mono/CppSharp,mohtamohit/CppSharp,inordertotest/CppSharp,inordertotest/CppSharp,genuinelucifer/CppSharp,zillemarco/CppSharp,u255436/CppSharp,zillemarco/CppSharp,inordertotest/CppSharp,genuinelucifer/CppSharp,mohtamohit/CppSharp,ktopouzi/CppSharp,mohtamohit/CppSharp,u255436/CppSharp,ktopouzi/CppSharp,mono/CppSharp,ddobrev/CppSharp,genuinelucifer/CppSharp,zillemarco/CppSharp,genuinelucifer/CppSharp,inordertotest/CppSharp,mono/CppSharp