Updating comments to be more accurate and fix typos
Merge pull request #344 from Kapin/master

Fixing comments to better reflect how methods work and some typo fixes
Inline the SDScaledImageForPath function so it doesn't polute the stack traces
Fixed typo.
SDWebImageDownloaderQueueMode type renamed. Fixed typo. Added description for renamed type. Type renamed because "queue" notion is a FIFO only, but LIFO is a stack, and if we give the type a neutral name, we can avoid logical inconsistencies.
Potential strong cycle fixed.
Merge branch 'develop'

* develop:
  Potential strong cycle fixed.
  SDWebImageDownloaderQueueMode type renamed. Fixed typo. Added description for renamed type. Type renamed because "queue" notion is a FIFO only, but LIFO is a stack, and if we give the type a neutral name, we can avoid logical inconsistencies.
  Fixed typo.
Merge pull request #351 from Vyazovoy/master

New name for SDWebImageDownloaderQueueMode type, typo fixing, strong cycle fixing.
-getSize now returns an `unsigned long long`.

This type now matches the type and width of the value returned by the
`fileSize` accessor of the `NSDictionary (NSFileAttributes)` category
(which is what is used when accumulating the total cache size).
Merge pull request #352 from jparise/getSize-return-type

-getSize now returns an `unsigned long long`.
Merge remote-tracking branch 'upstream/master'

* upstream/master:
  -getSize now returns an `unsigned long long`.
  Potential strong cycle fixed.
  SDWebImageDownloaderQueueMode type renamed. Fixed typo. Added description for renamed type. Type renamed because "queue" notion is a FIFO only, but LIFO is a stack, and if we give the type a neutral name, we can avoid logical inconsistencies.
  Fixed typo.
  Inline the SDScaledImageForPath function so it doesn't polute the stack traces
  Updating comments to be more accurate and fix typos