New: Newest client generation and base refactoring

.gitignore

generate-api-client.bat

src/ApiClient.sln

src/ApiClient/Coscine.ApiClient.Core.csproj

src/ApiClient/JwtConfiguration.cs

src/ApiClient/JwtUtil.cs

src/ApiClient/RequestUtil.cs

src/Coscine.ApiClient.Test/Api/AdminApiTests.cs

src/Coscine.ApiClient.Test/Api/ApplicationProfileApiTests.cs

src/Coscine.ApiClient.Test/Api/BlobApiTests.cs

src/Coscine.ApiClient.Test/Api/DisciplineApiTests.cs

src/Coscine.ApiClient.Test/Api/LanguageApiTests.cs

src/Coscine.ApiClient.Test/Api/LicenseApiTests.cs

src/Coscine.ApiClient.Test/Api/MaintenanceApiTests.cs

src/Coscine.ApiClient.Test/Api/OrganizationApiTests.cs

src/Coscine.ApiClient.Test/Api/PidApiTests.cs

src/Coscine.ApiClient.Test/Api/ProjectApiTests.cs

src/Coscine.ApiClient.Test/Api/ProjectInvitationApiTests.cs

src/Coscine.ApiClient.Test/Api/ProjectMemberApiTests.cs

src/Coscine.ApiClient.Test/Api/ProjectQuotaApiTests.cs