Let manipulate base64 bytes arrays to play with attachments
Added DokuAttachmentUploadException
Fixed bug when reading media size during getRecentMediaChanges
removed warning
Added tests for getRecentMediaChanges
Added getRecentMediaChanges(DateTime)
Fixed timezone
Removed println
Merge branch 'attachment'
Renamed AttachmentInfo to AttachmentDetails

Because getAttachmentInfo doesn't return that much details
Added attachment info
Fixed bug when reading perms with getAttachments
'fixed' test
Merge branch 'attachment'