Sorry, we are not going to add support for WMarket because it is going to be replaced by the Business API Ecosystem GE (it should be released on September).
The old instance of the Marketplace GE used in the Mashup portal (http://130.206.81.113/FiwareMarketplace/v1) was shutdown as it was hosted in the FIWARE testbed (instead of being part of FIWARE Lab) and the testbed is not longer active.
We are working on integrating WireCloud with the Business API Ecosystem GE, we estimate to have it ready by the end of September. In the meantime you will have to download the WireCloud components from the Store portal and installing them into WireCloud manually.
Sorry for the inconvenience.
Note: Support for the Business API Ecosystem was released in several stages (using a mashup, etc), but currently is fully integrated in WireCloud. Documentation on how to use that integration is available in WireCloud v1.1 onwards.