Tapasco API: Update

• tpc_device_acquire_job_id: return value should be tpc_res_t (consistency, HSR)
• polling interface: job completion query
• tpc_create_device / tpc_destroy_device: better names?
• namespace: just tpc
• capability query interface
• TPC++: const/non-const & and *
• support PE-local memories (e.g., MicroBlaze BRAMs)