Update README.md

Author: LakshmiChaitanyaReddy

Client-Side Components/Client Scripts/Hide Dependent Choice field if there no dependent choices/README.md

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 Hide the dependent choice field when there are no available options for the selected parent choice.
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 For example, if a selected category on the incident form has no subcategories, then the subcategory field should be hidden.
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+The file NumberOfDependentChoices.js is a client callable script include file which has a method which returns number of dependent choices for a selected choice of parent choice field.
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+HideDepnedentField.js is client script which hides the dependent choice field(ex:subcategory field on incident form) if there are no active choices to show for a selected choices of it's dependent field (example: category on incident form)