add validation of required methods for providers
Fail if imagemagick is not installed
Merge pull request #39 from Calamari/master

Fail if imagemagick is not installed
Merge pull request #37 from letsface/validate-provider

add validation of required methods for providers
Merge pull request #36 from 902Labs/master

Added support for new optional options boolean argument "idAsDirectory"....
Add propertyName to the attachment's defaultUrl

- allows multiple attachments with the same styles

closes #1
Update conditional '/' prefix
Merge pull request #44 from shake-apps/master

Add propertyName to the attachment's defaultUrl