* Feat(Bounds): add getTopLeft & getBottomRight methods
as suggested in #5475, for consistency with `LatLngBounds` methods which already provide methods for the 4 possible corners.
Also include the docstrings.
* Docs(Bounds): add comments to identify corners
in BoundsSpec.
* Test(Bounds): add tests for existing corner methods
namely getBottomLeft and getTopRight.
Checked that expecting different values make the tests fail.
* Test(Bounds): add spec for 2 new corner methods
namely getTopLeft and getBottomRight.
Closes#5475 together with previous PR #5487.
* Refactor(Bounds): return this.min(max) instead of new Point
as TopLeft corner is tha same as this.min (BottomRight same as this.max).
* Docs(Bounds): add links to this.min(max)
to make it clearer that these methods are just shorthands to already available properties.
Furthermore, it implies that they output those properties directly, making a clue for the app developer that if he/she wants to modify them, they should be cloned before doing so in order to prevent unintentional behaviour.
The rationale is this: the spec string describes the expected
behavior unconditionally. The code examples, on the other hand,
set up an expectation that is tested with the call to the expect
method. The code examples can violate the expectation, but the
spec string does not. The value of the spec string is as clearly
as possible describing the behavior. Including “should” in that
description adds no value. (From http://rubyspec.org/style_guide/)
