Updated metadata conventions.
Passed in algrev variable in function call.
Included a CF-compliant (?) time variable of Modified Julian Date
Added the .metadata and subdirectory to .gitignore file
The Univ of Bremen file downloaded by Judith on 19Mar2014.  This file was used to determine that subsequent files downloaded by Univ of Bremen did not simply append data to the end of the file.
Ignore a Mg II Univ of Bremen file download.
Ignore some test output of sunspot blocking files.