Fix README

[jasongitmail]

• Explain where view and this come from. (here)
• Finish or delete: To do that (here).

[vallemar]

Nice @jasongitmail, I have always thought that this plugin needs documentation improvements. I add some more

• What is this number 10? And what does the following parameter refer to? https://github.com/nativescript-community/gesturehandler/blob/master/packages/gesturehandler/blueprint.md?plain=1#L40
• Can we continue more views with the same manager or do we need to create another one?

[farfromrefug]

@jasongitmail @vallemar indeed you are right this is quite a complicated plugin and it needs better doc. as usual I would start with typings. would give a lot of answers.
for example you would see that 10 is for the handler "tag" it is like an Id. 2 handlers should not have the same tag. and it is used for example for waitFor
here is an example. https://github.com/nativescript-community/gesturehandler/blob/master/src/gesturehandler/gestures_override.ts#L204

[farfromrefug]

@vallemar you use Manager.getInstance() which is a singleton. So same for all views.