fix #311 restore test for single input and output

fix #309 

refine unit test

fix #305

fix #303 add fushion fc

update Gemm with implementation of 'C = alpha * A * B + beta * C'

fix #298 optimize some ops

fix #296 add resize output tensor

fix ubuntu compile

fix #292 add protobuf-c, remove third-party folder

update conv op kernel

fix #288 test relu with excu4test