Ready for Android Marshmallow

SkyKeyManager Class is newly added to SkyEpub SDK.
; SkyKeyManager manages the keys for the encrypted epub which is created by SkyDRM solution.

// Creator
public SkyKeyManager(String clientId,String clientSecret);
// String clientId : id to access SkyDRM server.
// String clientSecret : secret code to access SkyDRM server.

// gets the key for a content from SkyDRM Server.
public String getKey(String keyForContent,String keyForEpub);
// String keyForContent : uuid of a content which is encrypted inside epub.
// String keyForEpub : uuid of epub itself.