This commit adds the ability to include
additional information about a package's supplier
to the manifest.yaml file.
The format of the optional fields are as follows:
Supplier:
Name: <name of vendor>
CompanyUrl:
Link: <url>
Text: <anchor text>
Summary: <plain text summary of vendor>
Description: <html summary for dashboard>
Logo: <png filename of vendor logo in same dir>
Targets: blueprint additional-author-information
Change-Id: I9bb67089ad1bc554524ee828b9bfda38dc8251f6
zhurong