Get all/one specific snippet by its key
		Args:
			key			snippet key (default: None i.e. ALL)
			return		(status code, snippet dict or list thereof)

def get_snippet(self, snippet_key = None):
		'''Get all/one specific snippet by its key
		Args:
			key			snippet key (default: None i.e. ALL)
			return		(status code, snippet dict or list thereof)
		'''
		uri = '/'.join([
						self.api_uri,
						self.snippets_suffix
						])
		if snippet_key:
			uri = '/'.join([
							uri,
							snippet_key
							])

		code, data =  self._req('get', uri)
		
		return code, data