added token revocation

authorizer/src/asapo_authorizer/cli/cli.go

authorizer/src/asapo_authorizer/cli/command_test.go

authorizer/src/asapo_authorizer/cli/create_token.go

authorizer/src/asapo_authorizer/cli/create_token_test.go

authorizer/src/asapo_authorizer/cli/list_tokens.go

authorizer/src/asapo_authorizer/cli/list_tokens_test.go

authorizer/src/asapo_authorizer/cli/revoke_token.go

authorizer/src/asapo_authorizer/cli/revoke_token_test.go

authorizer/src/asapo_authorizer/common/settings.go

authorizer/src/asapo_authorizer/common/structs.go

authorizer/src/asapo_authorizer/server/authorize.go

authorizer/src/asapo_authorizer/server/authorize_test.go

authorizer/src/asapo_authorizer/server/db_request.go

authorizer/src/asapo_authorizer/server/db_request_test.go

authorizer/src/asapo_authorizer/server/folder_token.go

authorizer/src/asapo_authorizer/server/folder_token_test.go

authorizer/src/asapo_authorizer/server/server.go

authorizer/src/asapo_authorizer/server/server_nottested.go

authorizer/src/asapo_authorizer/server/server_test.go

authorizer/src/asapo_authorizer/token_store/database.go