Merge branch 'issue/408-Remove-Location-Metadata-From-Exif' into feature/Editor_207_Media_Upload_limit_issues
Add a WPMediaProcessor to handle all resizing and export of assets in the background.

This way we can have multiple image selection and don't block the main thread after selection.
Merge branch 'develop' into feature/Editor_207_Media_Upload_limit_issues

Conflicts:
	WordPress/Classes/Services/MediaService.m
	WordPress/Classes/ViewRelated/Post/WPLegacyEditPostViewController.m
	WordPress/Classes/ViewRelated/Post/WPPostViewController.m
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.
Show error messages to the user when feature image fails to export or upload.
Merge pull request #2745 from wordpress-mobile/feature/Editor_207_Media_Upload_limit_issues

Feature/editor 207 media upload limit issues