_hidebanner is private method not public
As public should be hideBanner() not private _hideBanner()
Renamed methods as no other component included component name in their
public methods

Removed white spaces as per gulp warnings.
Updated event handler method name in _setListners with new method name
'hide', was '_hide'

Reinstated showBanner() as deprecated method, as not to break existing
dep.
Calls new method show()

…> tags

Update HB/Docs & Test fix for GitHub .md files all showing <script> tags
at bottom of all .md pages

… <script> tags"

This reverts commit 3be0502.

Update HB/Docs & Test fix for GitHub .md files showing <script> tags
at bottom of all .md pages on github site and also tested with two
online editors and they also show <script> as plain text

Button , Callout, CheckBox, ChoiceFieldGroup, CommandBar,CommandButton,
ContextualMenu, Dialog & MessageBanner

Decoded html encoded strings back to tags.
FacePile.md still needs work

Edited all components MD
Note: Dialog Component MD needing help to fix broken Button layout

Found format error