add some class comments

Author: David Catmull

PBCommitList.h

@@ -12,6 +12,10 @@
 
 @class PBWebHistoryController;
 
+// Displays the list of commits. Additional behavior includes special key
+// handling and hiliting search results.
+// dataSource: PBRefController
+// delegate: PBGitHistoryController
 @interface PBCommitList : NSTableView {
 	IBOutlet WebView* webView;
 	IBOutlet PBWebHistoryController *webController;

PBCommitMessageView.h

@@ -8,6 +8,7 @@
 
 #import <Cocoa/Cocoa.h>
 
+// Adds the column guide displayed in the commit message field
 @interface PBCommitMessageView : NSTextView {
 
 }

PBFileChangesTableView.h

@@ -9,6 +9,8 @@
 #import <Cocoa/Cocoa.h>
 
 
+// File list used in both the staged and unstaged sides of the commit view.
+// datasource and deletage are PBGitIndexController.
 @interface PBFileChangesTableView : NSTableView {
 }
 

PBGitBinary.h

@@ -11,6 +11,7 @@
 
 #define MIN_GIT_VERSION "1.6.0"
 
+// Returns information about the git binary used to execute commands.
 @interface PBGitBinary : NSObject {
 
 }