Copy tweaks for Dot-Notation Syntax and Variables sections. Added description for Dot-Notation. Removed Image Naming section.

Author: ndubbs

README.md

@@ -45,7 +45,6 @@ Here are some of the documents from Apple that informed the style guide. If some
 * [CGRect Functions](#cgrect-functions)
 * [Golden Path](#golden-path)
 * [Error handling](#error-handling)
-* [Image Naming](#image-naming)
 * [Singletons](#singletons)
 * [Line Breaks](#line-breaks)
 * [Smiley Face](#smiley-face)
@@ -256,7 +255,9 @@ Variables should be named as descriptively as possible. Single letter variable n
 
 Asterisks indicating pointers belong with the variable, e.g., `NSString *text` not `NSString* text` or `NSString * text`, except in the case of constants.
 
-[Private properties](#private-properties) should be used in place of instance variables whenever possible. Direct access to instance variables that 'back' properties should be avoided except in initializer methods (`init`, `initWithCoder:`, etc…), `dealloc` methods and within custom setters and getters. For more information on using Accessor Methods in Initializer Methods and dealloc, see [here](https://developer.apple.com/library/mac/documentation/Cocoa/Conceptual/MemoryMgmt/Articles/mmPractical.html#//apple_ref/doc/uid/TP40004447-SW6).
+[Private properties](#private-properties) should be used in place of instance variables whenever possible. Although using instance variables is a valid way of doing things, by agreeing to prefer properties our code will be more consistent. 
+
+Direct access to instance variables that 'back' properties should be avoided except in initializer methods (`init`, `initWithCoder:`, etc…), `dealloc` methods and within custom setters and getters. For more information on using Accessor Methods in Initializer Methods and dealloc, see [here](https://developer.apple.com/library/mac/documentation/Cocoa/Conceptual/MemoryMgmt/Articles/mmPractical.html#//apple_ref/doc/uid/TP40004447-SW6).
 
 **Preferred:**
 
@@ -299,7 +300,9 @@ Property attributes should be explicitly listed, and will help new programmers w
 
 ## Dot-Notation Syntax
 
-Dot-notation should **always** be used for accessing and mutating properties. Bracket notation is preferred in all other instances.
+Dot syntax is purely a convenient wrapper around accessor method calls. When you use dot syntax, the property is still accessed or changed using getter and setter methods. Read more [here](https://developer.apple.com/library/ios/documentation/cocoa/conceptual/ProgrammingWithObjectiveC/EncapsulatingData/EncapsulatingData.html)
+
+Dot-notation should **always** be used for accessing and mutating properties, as it makes code more concise. Bracket notation is preferred in all other instances.
 
 **Preferred:**
 ```objc
@@ -637,16 +640,6 @@ if (error) {
 
 Some of Apple’s APIs write garbage values to the error parameter (if non-NULL) in successful cases, so switching on the error can cause false negatives (and subsequently crash).
 
-## Image Naming
-
-Image names should be named consistently to preserve organization and developer sanity. They should be named as one camel case string with a description of their purpose, followed by the un-prefixed name of the class or property they are customizing (if there is one), followed by a further description of color and/or placement, and finally their state.
-
-**Preferred:**
-
-* `RefreshBarButtonItem` / `RefreshBarButtonItem@2x` and `RefreshBarButtonItemSelected` / `RefreshBarButtonItemSelected@2x`
-* `ArticleNavigationBarWhite` / `ArticleNavigationBarWhite@2x` and `ArticleNavigationBarBlackSelected` / `ArticleNavigationBarBlackSelected@2x`.
-
-If asset catalogs are not used, images that are used for a similar purpose should be grouped in respective groups in an Images folder.
 
 ## Singletons