dropped unnecessary non-null check
Merge branch 'staabm-patch-1'

* staabm-patch-1:
  dropped unnecessary non-null check
Merge branch 'master' into develop

* master:
  dropped unnecessary non-null check
dropped unnecessary non-null check
Merge branch 'staabm-patch-2'

* staabm-patch-2:
  dropped unnecessary non-null check
Merge branch 'master' into develop

* master:
  dropped unnecessary non-null check
HHVM does not support Imagick::clone

Always use the clone keyword
http://docs.hhvm.com/manual/en/imagick.clone.php
Merge branch 'RdeWilde-patch-1'

* RdeWilde-patch-1:
  HHVM does not support Imagick::clone
Merge branch 'master' into develop

* master:
  HHVM does not support Imagick::clone
Add usage doc for show
Merge pull request #354 from h0gar/develop

Add usage doc for the show method
fix gmagick memory leak
null instead of unset
Moved lines that clear gmagick resources to distinct method; updated unit-tests
gmagick image: mention gmagick bug in phpdoc block