Manifest parsing does not handle multi-line manifest file.

This is the same as 4072218 but it is replicated here because it is on
a different source base.

The beanbox does not understand multi-line manifest file. If the bean name (+ package name) is over 66 characters, the manifest line describing line which must not exceed 72 chars must be split in two lines. The second line should start with a space to indicate this is the continuity of the previous line. The beanbox does not handle multiline manifest files.