Set the image placeholder only if isn't nil
Authorize users to have self-signed pinned certificates
Fixed static analyzer warning

The analyzer was complaining that it would be possible to assign nil to a mutable dictionary.
[Issue #1803] Making reachabilityManager property readwrite
Merge pull request #1801 from philippec/master

Fixed static analyzer warning
[Issue #1801] Additional logic necessary to avoid catching NSParameterAssert for delegate
Merge pull request #1788 from FredericJacobs/patch-1

Authorize users to have self-signed pinned certificates
Merge pull request #1768 from alexito4/master

Set the image placeholder only if isn't nil