updated stroke* functions to accept a linewidth param.
[#560] fixed the `updateBounds` function when the polyshape default position is offset
[#560] fixed shape drawing position (in debug mode)

following this last commit :
https://github.com/melonjs/melonJS/commit/7a48e2e3ba83a8f758c58a5fc113e58181e92cdc
[#560] body is not relative to the entity object

something is still off, so committing on a new branch for now
[#560] fixed body default initialization
[#560] fixed entity position when manually updating their position
fixed docs on animation sheet with tps
Merge remote-tracking branch 'upstream/master'

* upstream/master:
  fixed docs on animation sheet with tps
  [#560] fixed entity position when manually updating their position
  [#560] fixed body default initialization
  [#560] body is not relative to the entity object
  [#560] fixed shape drawing position (in debug mode)
  [#560] fixed the `updateBounds` function when the polyshape default position is offset
  updated stroke* functions to accept a linewidth param.