Multiple issues

[armandsLa]

There are multiple issues with this viewer:

• deleteLayout configuration is not implemented.
• multiple important functions are not made public, like removePage for example. There's no way to delete images without using default delete button, which can't be really customised, because deleteLayout is not implemented, i.e. autoresizing mask is not applied to custom button.
• footerViewLayout pinBoth does not work
• delegates are not referenced as weak and will cause memory leak

[RuiAAPeres]

Hi @armandsLa. Thanks for creating this bug list. We do accept PRs. 👍