Merge pull request #53 from ColinEberhardt/master

Changed naming example to use block quote
A little section rearranging

close #46
Add a sample override and private method

close #54
Add struct initializers section

ref #51
How to talk about functions

close #32
Bridging to Objective-C
Add note for mandatory self in closures
Merge pull request #56 from djui/patch-1

Add note for mandatory self in closures
A little less wordy and less strict about self
Changed "closure" to "closure expression" in a few locations

see #35

Note, Closure Expressions create Closures, hence the two terms can be used interchangeably in many instances. Apple does this in their language reference, e.g. they use "trailing closure syntax" rather than "trailing closure expression syntax".

However, there are a few instances in our style guide where I think 'Closure Expression' makes more sense.