Usability Improvements

[huangyz0918]

• Fixed the issues with auto profiler (can run the workflow using cli and web interface). @huangyz0918 Fixed the issues with profiler #247
• Auto conversion (tensorflow to onnx, onnx to tensorRT), add conversion CLI. mentor @univerone Improve convert function #248
• Refactor the dispatching functions, add CLI supports. @YuanmingLeee
  Refactor the dispatching functions #246