Document Fix:

[Gyx-One]

1.training tutorial refined.

[Gyx-One]

Thanks a lot for advice! @ganler

[Gyx-One]

Table replaced. checking grammarly.

[ganler]

@Gyx-One Thanks for the hard work. I think there is still some space for us to make it look more like a concrete tutorial.

To make it more concrete, let's:

• Section 1: first show a step-2-step code example regarding training;
• Section 2: how to do some modifications to achieve other goals (e.g., how to change to other models? how to change to other algorithms? How to enable parallel training?) And please do identify the corresponding APIs (using minimal code example) regarding the feature (otherwise users may still have no idea on how to apply them);
• Other sections...

Also, I'd like to mention some formatting issues regarding your recent PR on documentation.

• If you are writing some API stuff, use "`" to mark them. e.g.,vgg19_backbone,Config.DATA.USERDEF`.
  • ✅: one can refer Model.LightweightOpenpose class for reference.
  • ❌: one can refer Model.LightweightOpenpose class for reference.
• Whenever you finished a paragraph, a title ("###"), add an additional line-break to split the paragragraph.
• Add additional space for some python operators or commas.
  • ✅: pd_conf_map, pd_paf_map = my_model.forward(input_image[np.newaxis,...])
  • ❌: pd_conf_map,pd_paf_map=my_model.forward(input_image[np.newaxis,...])

You can refer to my last commit on yixiao branch to see how I made changes on your doc.