Sites and lists: 33 API change passages

Added the horizontalSectionLayoutType enumeration type. Added the pageLayoutType enumeration type. Added the pagePromotionType enumeration type. Added the sectionEmphasisType enumeration type. Added the titleAreaLayoutType enumeration type. Added the titleAreaTextAlignmentType enumeration type. Added the metaDataKeyStringPair resource type. Added the metaDataKeyValuePair resource type. Added the reactionsFacet resource type. Added the serverProcessedContent resource type. Removed the sitePageData resource type. Added the titleArea resource type. Added the webPartData resource type. Added the webPartPosition resource type. Added the canvasLayout resource. Added the horizontalSection resource and associated methods. Added the horizontalSectionColumn resource and associated methods. Added the pageLayout property to the sitePage resource. Removed the pageLayoutType property from the sitePage resource. Added the promotionKind property to the sitePage resource. Added the reactions property to the sitePage resource. Added the showComments property to the sitePage resource. Added the showRecommendedPages property to the sitePage resource. Added the thumbnailWebUrl property to the sitePage resource. Added the titleArea property to the sitePage resource. Removed the webParts property from the sitePage resource. Added the canvasLayout relationship to the sitePage resource. Added the webParts navigation property to the sitePage resource. Added the standardWebPart resource. Added the textWebPart resource. Added the verticalSection resource and associated methods. Added the getPositionOfWebPart method to the webPart resource. Added the getWebPartsByPosition method to the sitePage resource.