Feature/how to detect

[LauraRosePorter]

Suggested edits for how to detect section A1 - A4. If these are suitable changes etc, ill continue wit A5-A10.
These edits are mainly for the view of a pen tester.

[ErezYalon]

As mentioned in issue #21:
After some messages we got, followed by internal discussions, it was decided not to include the How to Detect section in the inaugural version of the API Security Top 10.
Even just by mentioning detection technologies we felt that we might fall into unwanted "vendor wars" that would not be acceptable under OWASPs vendor neutrality, and might also divert the attention from the actual goal of this document: raising awareness to the rising importance of API Security.
This section may be considered again in future versions, or in the API Security cheatsheet.