Integration refactor megacommit

- Removed obsolete logic for citation.properties.deleted, which is no
  longer set anywhere
- Introduced a bibliography class
- BibliographyEditInterface no longer edits state
- Fields._processFields() now has linear flow because:
- Exception handling for missing items and corrupt fields reworked to be
  handled in relevant Field classes, so that the flow remains linear
- Document modifying functions (i.e. Fields.updateDocument()) now only
  called in Zotero.Integration.Interface functions instead of all over
  the place
- document.setDocPrefs() now called after every execCommand() since
  the cost is trivial, but that simplifies a bunch of logic
- Misc code cleanup

TODO at some point in the future:
- Move Integration.(init/delete)Pipe out
- Decouple references and clarify functions in Integration.Fields and
  Integration.Session

chrome/content/zotero/integration/editBibliographyDialog.js

@@ -74,8 +74,8 @@ var Zotero_Bibliography_Dialog = new function () {
 		if(selectedItemIDs.length) {
 			for (let itemID of selectedItemIDs) {
 				var itemIndexToSelect = false;
-				for(var i in bibEditInterface.bibliography[0].entry_ids) {
+				for(var i in bibEditInterface.bib[0].entry_ids) {
-					if(bibEditInterface.bibliography[0].entry_ids[i].indexOf(itemID) !== -1) {
+					if(bibEditInterface.bib[0].entry_ids[i].indexOf(itemID) !== -1) {
 						itemIndexToSelect = i;
 						continue;
 					}
@@ -254,7 +254,7 @@ var Zotero_Bibliography_Dialog = new function () {
 	 */
 	function _getSelectedListItemIDs() {
 		return Array.from(_itemList.selectedItems)
-			.map(item => bibEditInterface.bibliography[0].entry_ids[item.value][0]);
+			.map(item => bibEditInterface.bib[0].entry_ids[item.value][0]);
 	}
 	
 	/**
@@ -287,8 +287,8 @@ var Zotero_Bibliography_Dialog = new function () {
 		
 		editor.readonly = index === undefined;
 		if(index !== undefined) {
-			var itemID = bibEditInterface.bibliography[0].entry_ids[index];
+			var itemID = bibEditInterface.bib[0].entry_ids[index];
-			editor.value = bibEditInterface.bibliography[1][index];
+			editor.value = bibEditInterface.bib[1][index];
 			_lastSelectedIndex = index;
 			_lastSelectedItemID = itemID;
 			_lastSelectedValue = editor.value;
@@ -304,7 +304,7 @@ var Zotero_Bibliography_Dialog = new function () {
 	 * loads items from itemSet
 	 */
 	function _loadItems() {
-		var itemIDs = bibEditInterface.bibliography[0].entry_ids;
+		var itemIDs = bibEditInterface.bib[0].entry_ids;
 		var items = itemIDs.map(itemID => Zotero.Cite.getItem(itemID[0]));
 		
 		// delete all existing items from list

chrome/content/zotero/xpcom/cite.js

@@ -16,13 +16,13 @@ Zotero.Cite = {
 	 * Remove specified item IDs in-place from a citeproc-js bibliography object returned
 	 * by makeBibliography()
 	 * @param {bib} citeproc-js bibliography object
-	 * @param {Array} itemsToRemove Array of items to remove
+	 * @param {Set} itemsToRemove Set of items to remove
 	 */
 	"removeFromBibliography":function(bib, itemsToRemove) {
 		var removeItems = [];
 		for(let i in bib[0].entry_ids) {
 			for(let j in bib[0].entry_ids[i]) {
-				if(itemsToRemove[bib[0].entry_ids[i][j]]) {
+				if(itemsToRemove.has(`${bib[0].entry_ids[i][j]}`)) {
 					removeItems.push(i);
 					break;
 				}