A more complete and understandable implementation of the search function

[baldassarreFe]

I wrote a more complete and understandable implementation of the search function. It deals with missing parameters as wildcards and can manage both single keywords and list of keywords. Can it be pulled into the main repository?

[filipkis]

Thank you for the effort and improving our examples. This kind of efforts are appreciated and welcomed.

Before this can be pulled in I would, however, request the following:

• rewriting the advanced JS features not yet widely supported (e.g. arrow functions)
• merging the code with current getAllDishes function in order to not have two functions that do the same thing. The old way of searching (type, filter) should also work (for backward compatibility). I guess only flipping the order in your method would be needed, but please make sure it logically works the same way.

I admit that getAllDishes is unfortunate name as it's not alway getting all the dishes. Therefore, there could be an alias method called search, and we could deprecate the getAllDishes slowly. However, first we need to have them both working the same.