Add possibility for showImage methods to have maskType

As discussed in #376, this commit makes SVProgressHUD's methods more consistent
Locally inhibit deprecation warning

This warning is not necessary since this code is only a fallback for older versions which don't support the otherwise invoked code, yet.
Update project settings to currently recommended

This simply applies the changes which are automatically suggested by Xcode 6.1

- Enables recommended warnings
- Automatically select architectures
- Build active architectures only when debugging
Merge branch 'project-settings'
Merge branch 'showImage-maskType'