Add support for renamed wp-content folder.
Merge pull request #4 from jessicaoros/master

Addon Packages Expiration
Fixed some bugs in the pmpro_addon_packages shortcode.
Merge branch 'master' of https://github.com/Praemitto/pmpro-addon-packages into Praemitto-master
Readme update.
Commented out PMPROAP_EXP_DAYS constant definition. (Put it in wp-config.php or another custom plugin to set.)