Add a WPMediaProcessor to handle all resizing and export of assets in the background.
Fix code layout of methods.
Remove unused methods.
Show better error messages when media fails when exporting.
Increase maximum number of images.
While uploading feature image don't allow to select another one.
Code layout fix.
Check for error instead of no media and add documentation explaining the semantics of completion block.
Code style issues.
Move comment to the right line.
Add localisation description to help translators.
Refactor class names and improved documentation.
Fix code style issues.
Remove commented out check.
Merge branch 'release/4.6' of github.com:wordpress-mobile/WordPress-iOS into issue/editor-344-bad-image-upload

# By Sérgio Estêvão
# Via Sérgio Estêvão
* 'release/4.6' of github.com:wordpress-mobile/WordPress-iOS:
  Remove commented out check.
  Fix code style issues.
  Refactor class names and improved documentation.
  Add localisation description to help translators.
  Move comment to the right line.
  Code style issues.
  Check for error instead of no media and add documentation explaining the semantics of completion block.
  Code layout fix.
  While uploading feature image don't allow to select another one.
  Increase maximum number of images.
  Show better error messages when media fails when exporting.
  Remove unused methods.
  Fix code layout of methods.
  Add a WPMediaProcessor to handle all resizing and export of assets in the background.

Conflicts:
	WordPress/Classes/ViewRelated/Post/WPPostViewController.m
Alertview updates.