Fix some .csproj's path case. (In order to build under linux)
Fix some .csproj's path case. (In order to build under linux)

joinrpg/joinrpg-net,leotsarev/joinrpg-net,leotsarev/joinrpg-net,joinrpg/joinrpg-net,leotsarev/joinrpg-net,leotsarev/joinrpg-net,joinrpg/joinrpg-net,joinrpg/joinrpg-net